Alright, let's solve this math problem step by step. First, we have the number 851. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 83. So, we're going to take the number 851 and add it to itself 83 times.
Step 1: 0 + 851 = 851
Step 2: 851 + 851 = 1702
Step 3: 1702 + 851 = 2553
Step 4: 2553 + 851 = 3404
Step 5: 3404 + 851 = 4255
Step 6: 4255 + 851 = 5106
Step 7: 5106 + 851 = 5957
Step 8: 5957 + 851 = 6808
Step 9: 6808 + 851 = 7659
Step 10: 7659 + 851 = 8510
Step 11: 8510 + 851 = 9361
Step 12: 9361 + 851 = 10212
Step 13: 10212 + 851 = 11063
Step 14: 11063 + 851 = 11914
Step 15: 11914 + 851 = 12765
Step 16: 12765 + 851 = 13616
Step 17: 13616 + 851 = 14467
Step 18: 14467 + 851 = 15318
Step 19: 15318 + 851 = 16169
Step 20: 16169 + 851 = 17020
Step 21: 17020 + 851 = 17871
Step 22: 17871 + 851 = 18722
Step 23: 18722 + 851 = 19573
Step 24: 19573 + 851 = 20424
Step 25: 20424 + 851 = 21275
Step 26: 21275 + 851 = 22126
Step 27: 22126 + 851 = 22977
Step 28: 22977 + 851 = 23828
Step 29: 23828 + 851 = 24679
Step 30: 24679 + 851 = 25530
Step 31: 25530 + 851 = 26381
Step 32: 26381 + 851 = 27232
Step 33: 27232 + 851 = 28083
Step 34: 28083 + 851 = 28934
Step 35: 28934 + 851 = 29785
Step 36: 29785 + 851 = 30636
Step 37: 30636 + 851 = 31487
Step 38: 31487 + 851 = 32338
Step 39: 32338 + 851 = 33189
Step 40: 33189 + 851 = 34040
Step 41: 34040 + 851 = 34891
Step 42: 34891 + 851 = 35742
Step 43: 35742 + 851 = 36593
Step 44: 36593 + 851 = 37444
Step 45: 37444 + 851 = 38295
Step 46: 38295 + 851 = 39146
Step 47: 39146 + 851 = 39997
Step 48: 39997 + 851 = 40848
Step 49: 40848 + 851 = 41699
Step 50: 41699 + 851 = 42550
Step 51: 42550 + 851 = 43401
Step 52: 43401 + 851 = 44252
Step 53: 44252 + 851 = 45103
Step 54: 45103 + 851 = 45954
Step 55: 45954 + 851 = 46805
Step 56: 46805 + 851 = 47656
Step 57: 47656 + 851 = 48507
Step 58: 48507 + 851 = 49358
Step 59: 49358 + 851 = 50209
Step 60: 50209 + 851 = 51060
Step 61: 51060 + 851 = 51911
Step 62: 51911 + 851 = 52762
Step 63: 52762 + 851 = 53613
Step 64: 53613 + 851 = 54464
Step 65: 54464 + 851 = 55315
Step 66: 55315 + 851 = 56166
Step 67: 56166 + 851 = 57017
Step 68: 57017 + 851 = 57868
Step 69: 57868 + 851 = 58719
Step 70: 58719 + 851 = 59570
Step 71: 59570 + 851 = 60421
Step 72: 60421 + 851 = 61272
Step 73: 61272 + 851 = 62123
Step 74: 62123 + 851 = 62974
Step 75: 62974 + 851 = 63825
Step 76: 63825 + 851 = 64676
Step 77: 64676 + 851 = 65527
Step 78: 65527 + 851 = 66378
Step 79: 66378 + 851 = 67229
Step 80: 67229 + 851 = 68080
Step 81: 68080 + 851 = 68931
Step 82: 68931 + 851 = 69782
Step 83: 69782 + 851 = 70633

So, 851*83 = 70633