OK, let's work through this together. We're starting with 762 and we're going to multiply it by 77, which means we add 762 to itself 77 times.
Step 1: 0 + 762 = 762
Step 2: 762 + 762 = 1524
Step 3: 1524 + 762 = 2286
Step 4: 2286 + 762 = 3048
Step 5: 3048 + 762 = 3810
Step 6: 3810 + 762 = 4572
Step 7: 4572 + 762 = 5334
Step 8: 5334 + 762 = 6096
Step 9: 6096 + 762 = 6858
Step 10: 6858 + 762 = 7620
Step 11: 7620 + 762 = 8382
Step 12: 8382 + 762 = 9144
Step 13: 9144 + 762 = 9906
Step 14: 9906 + 762 = 10668
Step 15: 10668 + 762 = 11430
Step 16: 11430 + 762 = 12192
Step 17: 12192 + 762 = 12954
Step 18: 12954 + 762 = 13716
Step 19: 13716 + 762 = 14478
Step 20: 14478 + 762 = 15240
Step 21: 15240 + 762 = 16002
Step 22: 16002 + 762 = 16764
Step 23: 16764 + 762 = 17526
Step 24: 17526 + 762 = 18288
Step 25: 18288 + 762 = 19050
Step 26: 19050 + 762 = 19812
Step 27: 19812 + 762 = 20574
Step 28: 20574 + 762 = 21336
Step 29: 21336 + 762 = 22098
Step 30: 22098 + 762 = 22860
Step 31: 22860 + 762 = 23622
Step 32: 23622 + 762 = 24384
Step 33: 24384 + 762 = 25146
Step 34: 25146 + 762 = 25908
Step 35: 25908 + 762 = 26670
Step 36: 26670 + 762 = 27432
Step 37: 27432 + 762 = 28194
Step 38: 28194 + 762 = 28956
Step 39: 28956 + 762 = 29718
Step 40: 29718 + 762 = 30480
Step 41: 30480 + 762 = 31242
Step 42: 31242 + 762 = 32004
Step 43: 32004 + 762 = 32766
Step 44: 32766 + 762 = 33528
Step 45: 33528 + 762 = 34290
Step 46: 34290 + 762 = 35052
Step 47: 35052 + 762 = 35814
Step 48: 35814 + 762 = 36576
Step 49: 36576 + 762 = 37338
Step 50: 37338 + 762 = 38100
Step 51: 38100 + 762 = 38862
Step 52: 38862 + 762 = 39624
Step 53: 39624 + 762 = 40386
Step 54: 40386 + 762 = 41148
Step 55: 41148 + 762 = 41910
Step 56: 41910 + 762 = 42672
Step 57: 42672 + 762 = 43434
Step 58: 43434 + 762 = 44196
Step 59: 44196 + 762 = 44958
Step 60: 44958 + 762 = 45720
Step 61: 45720 + 762 = 46482
Step 62: 46482 + 762 = 47244
Step 63: 47244 + 762 = 48006
Step 64: 48006 + 762 = 48768
Step 65: 48768 + 762 = 49530
Step 66: 49530 + 762 = 50292
Step 67: 50292 + 762 = 51054
Step 68: 51054 + 762 = 51816
Step 69: 51816 + 762 = 52578
Step 70: 52578 + 762 = 53340
Step 71: 53340 + 762 = 54102
Step 72: 54102 + 762 = 54864
Step 73: 54864 + 762 = 55626
Step 74: 55626 + 762 = 56388
Step 75: 56388 + 762 = 57150
Step 76: 57150 + 762 = 57912
Step 77: 57912 + 762 = 58674

So, 762*77 = 58674