Alright, let's solve this math problem step by step. First, we have the number 685. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 102. So, we're going to take the number 685 and add it to itself 102 times.
Step 1: 0 + 685 = 685
Step 2: 685 + 685 = 1370
Step 3: 1370 + 685 = 2055
Step 4: 2055 + 685 = 2740
Step 5: 2740 + 685 = 3425
Step 6: 3425 + 685 = 4110
Step 7: 4110 + 685 = 4795
Step 8: 4795 + 685 = 5480
Step 9: 5480 + 685 = 6165
Step 10: 6165 + 685 = 6850
Step 11: 6850 + 685 = 7535
Step 12: 7535 + 685 = 8220
Step 13: 8220 + 685 = 8905
Step 14: 8905 + 685 = 9590
Step 15: 9590 + 685 = 10275
Step 16: 10275 + 685 = 10960
Step 17: 10960 + 685 = 11645
Step 18: 11645 + 685 = 12330
Step 19: 12330 + 685 = 13015
Step 20: 13015 + 685 = 13700
Step 21: 13700 + 685 = 14385
Step 22: 14385 + 685 = 15070
Step 23: 15070 + 685 = 15755
Step 24: 15755 + 685 = 16440
Step 25: 16440 + 685 = 17125
Step 26: 17125 + 685 = 17810
Step 27: 17810 + 685 = 18495
Step 28: 18495 + 685 = 19180
Step 29: 19180 + 685 = 19865
Step 30: 19865 + 685 = 20550
Step 31: 20550 + 685 = 21235
Step 32: 21235 + 685 = 21920
Step 33: 21920 + 685 = 22605
Step 34: 22605 + 685 = 23290
Step 35: 23290 + 685 = 23975
Step 36: 23975 + 685 = 24660
Step 37: 24660 + 685 = 25345
Step 38: 25345 + 685 = 26030
Step 39: 26030 + 685 = 26715
Step 40: 26715 + 685 = 27400
Step 41: 27400 + 685 = 28085
Step 42: 28085 + 685 = 28770
Step 43: 28770 + 685 = 29455
Step 44: 29455 + 685 = 30140
Step 45: 30140 + 685 = 30825
Step 46: 30825 + 685 = 31510
Step 47: 31510 + 685 = 32195
Step 48: 32195 + 685 = 32880
Step 49: 32880 + 685 = 33565
Step 50: 33565 + 685 = 34250
Step 51: 34250 + 685 = 34935
Step 52: 34935 + 685 = 35620
Step 53: 35620 + 685 = 36305
Step 54: 36305 + 685 = 36990
Step 55: 36990 + 685 = 37675
Step 56: 37675 + 685 = 38360
Step 57: 38360 + 685 = 39045
Step 58: 39045 + 685 = 39730
Step 59: 39730 + 685 = 40415
Step 60: 40415 + 685 = 41100
Step 61: 41100 + 685 = 41785
Step 62: 41785 + 685 = 42470
Step 63: 42470 + 685 = 43155
Step 64: 43155 + 685 = 43840
Step 65: 43840 + 685 = 44525
Step 66: 44525 + 685 = 45210
Step 67: 45210 + 685 = 45895
Step 68: 45895 + 685 = 46580
Step 69: 46580 + 685 = 47265
Step 70: 47265 + 685 = 47950
Step 71: 47950 + 685 = 48635
Step 72: 48635 + 685 = 49320
Step 73: 49320 + 685 = 50005
Step 74: 50005 + 685 = 50690
Step 75: 50690 + 685 = 51375
Step 76: 51375 + 685 = 52060
Step 77: 52060 + 685 = 52745
Step 78: 52745 + 685 = 53430
Step 79: 53430 + 685 = 54115
Step 80: 54115 + 685 = 54800
Step 81: 54800 + 685 = 55485
Step 82: 55485 + 685 = 56170
Step 83: 56170 + 685 = 56855
Step 84: 56855 + 685 = 57540
Step 85: 57540 + 685 = 58225
Step 86: 58225 + 685 = 58910
Step 87: 58910 + 685 = 59595
Step 88: 59595 + 685 = 60280
Step 89: 60280 + 685 = 60965
Step 90: 60965 + 685 = 61650
Step 91: 61650 + 685 = 62335
Step 92: 62335 + 685 = 63020
Step 93: 63020 + 685 = 63705
Step 94: 63705 + 685 = 64390
Step 95: 64390 + 685 = 65075
Step 96: 65075 + 685 = 65760
Step 97: 65760 + 685 = 66445
Step 98: 66445 + 685 = 67130
Step 99: 67130 + 685 = 67815
Step 100: 67815 + 685 = 68500
Step 101: 68500 + 685 = 69185
Step 102: 69185 + 685 = 69870

So, 685*102 = 69870