Alright, let's solve this math problem step by step. First, we have the number 309. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 86. So, we're going to take the number 309 and add it to itself 86 times.
Step 1: 0 + 309 = 309
Step 2: 309 + 309 = 618
Step 3: 618 + 309 = 927
Step 4: 927 + 309 = 1236
Step 5: 1236 + 309 = 1545
Step 6: 1545 + 309 = 1854
Step 7: 1854 + 309 = 2163
Step 8: 2163 + 309 = 2472
Step 9: 2472 + 309 = 2781
Step 10: 2781 + 309 = 3090
Step 11: 3090 + 309 = 3399
Step 12: 3399 + 309 = 3708
Step 13: 3708 + 309 = 4017
Step 14: 4017 + 309 = 4326
Step 15: 4326 + 309 = 4635
Step 16: 4635 + 309 = 4944
Step 17: 4944 + 309 = 5253
Step 18: 5253 + 309 = 5562
Step 19: 5562 + 309 = 5871
Step 20: 5871 + 309 = 6180
Step 21: 6180 + 309 = 6489
Step 22: 6489 + 309 = 6798
Step 23: 6798 + 309 = 7107
Step 24: 7107 + 309 = 7416
Step 25: 7416 + 309 = 7725
Step 26: 7725 + 309 = 8034
Step 27: 8034 + 309 = 8343
Step 28: 8343 + 309 = 8652
Step 29: 8652 + 309 = 8961
Step 30: 8961 + 309 = 9270
Step 31: 9270 + 309 = 9579
Step 32: 9579 + 309 = 9888
Step 33: 9888 + 309 = 10197
Step 34: 10197 + 309 = 10506
Step 35: 10506 + 309 = 10815
Step 36: 10815 + 309 = 11124
Step 37: 11124 + 309 = 11433
Step 38: 11433 + 309 = 11742
Step 39: 11742 + 309 = 12051
Step 40: 12051 + 309 = 12360
Step 41: 12360 + 309 = 12669
Step 42: 12669 + 309 = 12978
Step 43: 12978 + 309 = 13287
Step 44: 13287 + 309 = 13596
Step 45: 13596 + 309 = 13905
Step 46: 13905 + 309 = 14214
Step 47: 14214 + 309 = 14523
Step 48: 14523 + 309 = 14832
Step 49: 14832 + 309 = 15141
Step 50: 15141 + 309 = 15450
Step 51: 15450 + 309 = 15759
Step 52: 15759 + 309 = 16068
Step 53: 16068 + 309 = 16377
Step 54: 16377 + 309 = 16686
Step 55: 16686 + 309 = 16995
Step 56: 16995 + 309 = 17304
Step 57: 17304 + 309 = 17613
Step 58: 17613 + 309 = 17922
Step 59: 17922 + 309 = 18231
Step 60: 18231 + 309 = 18540
Step 61: 18540 + 309 = 18849
Step 62: 18849 + 309 = 19158
Step 63: 19158 + 309 = 19467
Step 64: 19467 + 309 = 19776
Step 65: 19776 + 309 = 20085
Step 66: 20085 + 309 = 20394
Step 67: 20394 + 309 = 20703
Step 68: 20703 + 309 = 21012
Step 69: 21012 + 309 = 21321
Step 70: 21321 + 309 = 21630
Step 71: 21630 + 309 = 21939
Step 72: 21939 + 309 = 22248
Step 73: 22248 + 309 = 22557
Step 74: 22557 + 309 = 22866
Step 75: 22866 + 309 = 23175
Step 76: 23175 + 309 = 23484
Step 77: 23484 + 309 = 23793
Step 78: 23793 + 309 = 24102
Step 79: 24102 + 309 = 24411
Step 80: 24411 + 309 = 24720
Step 81: 24720 + 309 = 25029
Step 82: 25029 + 309 = 25338
Step 83: 25338 + 309 = 25647
Step 84: 25647 + 309 = 25956
Step 85: 25956 + 309 = 26265
Step 86: 26265 + 309 = 26574

So, 309*86 = 26574