Let's get this math done. We have 756 and we're going to multiply it by 78. This is the same as taking 756 and adding it to itself 78 times.
Step 1: 0 + 756 = 756
Step 2: 756 + 756 = 1512
Step 3: 1512 + 756 = 2268
Step 4: 2268 + 756 = 3024
Step 5: 3024 + 756 = 3780
Step 6: 3780 + 756 = 4536
Step 7: 4536 + 756 = 5292
Step 8: 5292 + 756 = 6048
Step 9: 6048 + 756 = 6804
Step 10: 6804 + 756 = 7560
Step 11: 7560 + 756 = 8316
Step 12: 8316 + 756 = 9072
Step 13: 9072 + 756 = 9828
Step 14: 9828 + 756 = 10584
Step 15: 10584 + 756 = 11340
Step 16: 11340 + 756 = 12096
Step 17: 12096 + 756 = 12852
Step 18: 12852 + 756 = 13608
Step 19: 13608 + 756 = 14364
Step 20: 14364 + 756 = 15120
Step 21: 15120 + 756 = 15876
Step 22: 15876 + 756 = 16632
Step 23: 16632 + 756 = 17388
Step 24: 17388 + 756 = 18144
Step 25: 18144 + 756 = 18900
Step 26: 18900 + 756 = 19656
Step 27: 19656 + 756 = 20412
Step 28: 20412 + 756 = 21168
Step 29: 21168 + 756 = 21924
Step 30: 21924 + 756 = 22680
Step 31: 22680 + 756 = 23436
Step 32: 23436 + 756 = 24192
Step 33: 24192 + 756 = 24948
Step 34: 24948 + 756 = 25704
Step 35: 25704 + 756 = 26460
Step 36: 26460 + 756 = 27216
Step 37: 27216 + 756 = 27972
Step 38: 27972 + 756 = 28728
Step 39: 28728 + 756 = 29484
Step 40: 29484 + 756 = 30240
Step 41: 30240 + 756 = 30996
Step 42: 30996 + 756 = 31752
Step 43: 31752 + 756 = 32508
Step 44: 32508 + 756 = 33264
Step 45: 33264 + 756 = 34020
Step 46: 34020 + 756 = 34776
Step 47: 34776 + 756 = 35532
Step 48: 35532 + 756 = 36288
Step 49: 36288 + 756 = 37044
Step 50: 37044 + 756 = 37800
Step 51: 37800 + 756 = 38556
Step 52: 38556 + 756 = 39312
Step 53: 39312 + 756 = 40068
Step 54: 40068 + 756 = 40824
Step 55: 40824 + 756 = 41580
Step 56: 41580 + 756 = 42336
Step 57: 42336 + 756 = 43092
Step 58: 43092 + 756 = 43848
Step 59: 43848 + 756 = 44604
Step 60: 44604 + 756 = 45360
Step 61: 45360 + 756 = 46116
Step 62: 46116 + 756 = 46872
Step 63: 46872 + 756 = 47628
Step 64: 47628 + 756 = 48384
Step 65: 48384 + 756 = 49140
Step 66: 49140 + 756 = 49896
Step 67: 49896 + 756 = 50652
Step 68: 50652 + 756 = 51408
Step 69: 51408 + 756 = 52164
Step 70: 52164 + 756 = 52920
Step 71: 52920 + 756 = 53676
Step 72: 53676 + 756 = 54432
Step 73: 54432 + 756 = 55188
Step 74: 55188 + 756 = 55944
Step 75: 55944 + 756 = 56700
Step 76: 56700 + 756 = 57456
Step 77: 57456 + 756 = 58212
Step 78: 58212 + 756 = 58968

So, 756*78 = 58968