OK, let's work through this together. We're starting with 910 and we're going to multiply it by 225, which means we add 910 to itself 225 times.
Step 1: 0 + 910 = 910
Step 2: 910 + 910 = 1820
Step 3: 1820 + 910 = 2730
Step 4: 2730 + 910 = 3640
Step 5: 3640 + 910 = 4550
Step 6: 4550 + 910 = 5460
Step 7: 5460 + 910 = 6370
Step 8: 6370 + 910 = 7280
Step 9: 7280 + 910 = 8190
Step 10: 8190 + 910 = 9100
Step 11: 9100 + 910 = 10010
Step 12: 10010 + 910 = 10920
Step 13: 10920 + 910 = 11830
Step 14: 11830 + 910 = 12740
Step 15: 12740 + 910 = 13650
Step 16: 13650 + 910 = 14560
Step 17: 14560 + 910 = 15470
Step 18: 15470 + 910 = 16380
Step 19: 16380 + 910 = 17290
Step 20: 17290 + 910 = 18200
Step 21: 18200 + 910 = 19110
Step 22: 19110 + 910 = 20020
Step 23: 20020 + 910 = 20930
Step 24: 20930 + 910 = 21840
Step 25: 21840 + 910 = 22750
Step 26: 22750 + 910 = 23660
Step 27: 23660 + 910 = 24570
Step 28: 24570 + 910 = 25480
Step 29: 25480 + 910 = 26390
Step 30: 26390 + 910 = 27300
Step 31: 27300 + 910 = 28210
Step 32: 28210 + 910 = 29120
Step 33: 29120 + 910 = 30030
Step 34: 30030 + 910 = 30940
Step 35: 30940 + 910 = 31850
Step 36: 31850 + 910 = 32760
Step 37: 32760 + 910 = 33670
Step 38: 33670 + 910 = 34580
Step 39: 34580 + 910 = 35490
Step 40: 35490 + 910 = 36400
Step 41: 36400 + 910 = 37310
Step 42: 37310 + 910 = 38220
Step 43: 38220 + 910 = 39130
Step 44: 39130 + 910 = 40040
Step 45: 40040 + 910 = 40950
Step 46: 40950 + 910 = 41860
Step 47: 41860 + 910 = 42770
Step 48: 42770 + 910 = 43680
Step 49: 43680 + 910 = 44590
Step 50: 44590 + 910 = 45500
Step 51: 45500 + 910 = 46410
Step 52: 46410 + 910 = 47320
Step 53: 47320 + 910 = 48230
Step 54: 48230 + 910 = 49140
Step 55: 49140 + 910 = 50050
Step 56: 50050 + 910 = 50960
Step 57: 50960 + 910 = 51870
Step 58: 51870 + 910 = 52780
Step 59: 52780 + 910 = 53690
Step 60: 53690 + 910 = 54600
Step 61: 54600 + 910 = 55510
Step 62: 55510 + 910 = 56420
Step 63: 56420 + 910 = 57330
Step 64: 57330 + 910 = 58240
Step 65: 58240 + 910 = 59150
Step 66: 59150 + 910 = 60060
Step 67: 60060 + 910 = 60970
Step 68: 60970 + 910 = 61880
Step 69: 61880 + 910 = 62790
Step 70: 62790 + 910 = 63700
Step 71: 63700 + 910 = 64610
Step 72: 64610 + 910 = 65520
Step 73: 65520 + 910 = 66430
Step 74: 66430 + 910 = 67340
Step 75: 67340 + 910 = 68250
Step 76: 68250 + 910 = 69160
Step 77: 69160 + 910 = 70070
Step 78: 70070 + 910 = 70980
Step 79: 70980 + 910 = 71890
Step 80: 71890 + 910 = 72800
Step 81: 72800 + 910 = 73710
Step 82: 73710 + 910 = 74620
Step 83: 74620 + 910 = 75530
Step 84: 75530 + 910 = 76440
Step 85: 76440 + 910 = 77350
Step 86: 77350 + 910 = 78260
Step 87: 78260 + 910 = 79170
Step 88: 79170 + 910 = 80080
Step 89: 80080 + 910 = 80990
Step 90: 80990 + 910 = 81900
Step 91: 81900 + 910 = 82810
Step 92: 82810 + 910 = 83720
Step 93: 83720 + 910 = 84630
Step 94: 84630 + 910 = 85540
Step 95: 85540 + 910 = 86450
Step 96: 86450 + 910 = 87360
Step 97: 87360 + 910 = 88270
Step 98: 88270 + 910 = 89180
Step 99: 89180 + 910 = 90090
Step 100: 90090 + 910 = 91000
Step 101: 91000 + 910 = 91910
Step 102: 91910 + 910 = 92820
Step 103: 92820 + 910 = 93730
Step 104: 93730 + 910 = 94640
Step 105: 94640 + 910 = 95550
Step 106: 95550 + 910 = 96460
Step 107: 96460 + 910 = 97370
Step 108: 97370 + 910 = 98280
Step 109: 98280 + 910 = 99190
Step 110: 99190 + 910 = 100100
Step 111: 100100 + 910 = 101010
Step 112: 101010 + 910 = 101920
Step 113: 101920 + 910 = 102830
Step 114: 102830 + 910 = 103740
Step 115: 103740 + 910 = 104650
Step 116: 104650 + 910 = 105560
Step 117: 105560 + 910 = 106470
Step 118: 106470 + 910 = 107380
Step 119: 107380 + 910 = 108290
Step 120: 108290 + 910 = 109200
Step 121: 109200 + 910 = 110110
Step 122: 110110 + 910 = 111020
Step 123: 111020 + 910 = 111930
Step 124: 111930 + 910 = 112840
Step 125: 112840 + 910 = 113750
Step 126: 113750 + 910 = 114660
Step 127: 114660 + 910 = 115570
Step 128: 115570 + 910 = 116480
Step 129: 116480 + 910 = 117390
Step 130: 117390 + 910 = 118300
Step 131: 118300 + 910 = 119210
Step 132: 119210 + 910 = 120120
Step 133: 120120 + 910 = 121030
Step 134: 121030 + 910 = 121940
Step 135: 121940 + 910 = 122850
Step 136: 122850 + 910 = 123760
Step 137: 123760 + 910 = 124670
Step 138: 124670 + 910 = 125580
Step 139: 125580 + 910 = 126490
Step 140: 126490 + 910 = 127400
Step 141: 127400 + 910 = 128310
Step 142: 128310 + 910 = 129220
Step 143: 129220 + 910 = 130130
Step 144: 130130 + 910 = 131040
Step 145: 131040 + 910 = 131950
Step 146: 131950 + 910 = 132860
Step 147: 132860 + 910 = 133770
Step 148: 133770 + 910 = 134680
Step 149: 134680 + 910 = 135590
Step 150: 135590 + 910 = 136500
Step 151: 136500 + 910 = 137410
Step 152: 137410 + 910 = 138320
Step 153: 138320 + 910 = 139230
Step 154: 139230 + 910 = 140140
Step 155: 140140 + 910 = 141050
Step 156: 141050 + 910 = 141960
Step 157: 141960 + 910 = 142870
Step 158: 142870 + 910 = 143780
Step 159: 143780 + 910 = 144690
Step 160: 144690 + 910 = 145600
Step 161: 145600 + 910 = 146510
Step 162: 146510 + 910 = 147420
Step 163: 147420 + 910 = 148330
Step 164: 148330 + 910 = 149240
Step 165: 149240 + 910 = 150150
Step 166: 150150 + 910 = 151060
Step 167: 151060 + 910 = 151970
Step 168: 151970 + 910 = 152880
Step 169: 152880 + 910 = 153790
Step 170: 153790 + 910 = 154700
Step 171: 154700 + 910 = 155610
Step 172: 155610 + 910 = 156520
Step 173: 156520 + 910 = 157430
Step 174: 157430 + 910 = 158340
Step 175: 158340 + 910 = 159250
Step 176: 159250 + 910 = 160160
Step 177: 160160 + 910 = 161070
Step 178: 161070 + 910 = 161980
Step 179: 161980 + 910 = 162890
Step 180: 162890 + 910 = 163800
Step 181: 163800 + 910 = 164710
Step 182: 164710 + 910 = 165620
Step 183: 165620 + 910 = 166530
Step 184: 166530 + 910 = 167440
Step 185: 167440 + 910 = 168350
Step 186: 168350 + 910 = 169260
Step 187: 169260 + 910 = 170170
Step 188: 170170 + 910 = 171080
Step 189: 171080 + 910 = 171990
Step 190: 171990 + 910 = 172900
Step 191: 172900 + 910 = 173810
Step 192: 173810 + 910 = 174720
Step 193: 174720 + 910 = 175630
Step 194: 175630 + 910 = 176540
Step 195: 176540 + 910 = 177450
Step 196: 177450 + 910 = 178360
Step 197: 178360 + 910 = 179270
Step 198: 179270 + 910 = 180180
Step 199: 180180 + 910 = 181090
Step 200: 181090 + 910 = 182000
Step 201: 182000 + 910 = 182910
Step 202: 182910 + 910 = 183820
Step 203: 183820 + 910 = 184730
Step 204: 184730 + 910 = 185640
Step 205: 185640 + 910 = 186550
Step 206: 186550 + 910 = 187460
Step 207: 187460 + 910 = 188370
Step 208: 188370 + 910 = 189280
Step 209: 189280 + 910 = 190190
Step 210: 190190 + 910 = 191100
Step 211: 191100 + 910 = 192010
Step 212: 192010 + 910 = 192920
Step 213: 192920 + 910 = 193830
Step 214: 193830 + 910 = 194740
Step 215: 194740 + 910 = 195650
Step 216: 195650 + 910 = 196560
Step 217: 196560 + 910 = 197470
Step 218: 197470 + 910 = 198380
Step 219: 198380 + 910 = 199290
Step 220: 199290 + 910 = 200200
Step 221: 200200 + 910 = 201110
Step 222: 201110 + 910 = 202020
Step 223: 202020 + 910 = 202930
Step 224: 202930 + 910 = 203840
Step 225: 203840 + 910 = 204750

So, 910*225 = 204750