Let's get this math done. We have 919 and we're going to multiply it by 78. This is the same as taking 919 and adding it to itself 78 times.
Step 1: 0 + 919 = 919
Step 2: 919 + 919 = 1838
Step 3: 1838 + 919 = 2757
Step 4: 2757 + 919 = 3676
Step 5: 3676 + 919 = 4595
Step 6: 4595 + 919 = 5514
Step 7: 5514 + 919 = 6433
Step 8: 6433 + 919 = 7352
Step 9: 7352 + 919 = 8271
Step 10: 8271 + 919 = 9190
Step 11: 9190 + 919 = 10109
Step 12: 10109 + 919 = 11028
Step 13: 11028 + 919 = 11947
Step 14: 11947 + 919 = 12866
Step 15: 12866 + 919 = 13785
Step 16: 13785 + 919 = 14704
Step 17: 14704 + 919 = 15623
Step 18: 15623 + 919 = 16542
Step 19: 16542 + 919 = 17461
Step 20: 17461 + 919 = 18380
Step 21: 18380 + 919 = 19299
Step 22: 19299 + 919 = 20218
Step 23: 20218 + 919 = 21137
Step 24: 21137 + 919 = 22056
Step 25: 22056 + 919 = 22975
Step 26: 22975 + 919 = 23894
Step 27: 23894 + 919 = 24813
Step 28: 24813 + 919 = 25732
Step 29: 25732 + 919 = 26651
Step 30: 26651 + 919 = 27570
Step 31: 27570 + 919 = 28489
Step 32: 28489 + 919 = 29408
Step 33: 29408 + 919 = 30327
Step 34: 30327 + 919 = 31246
Step 35: 31246 + 919 = 32165
Step 36: 32165 + 919 = 33084
Step 37: 33084 + 919 = 34003
Step 38: 34003 + 919 = 34922
Step 39: 34922 + 919 = 35841
Step 40: 35841 + 919 = 36760
Step 41: 36760 + 919 = 37679
Step 42: 37679 + 919 = 38598
Step 43: 38598 + 919 = 39517
Step 44: 39517 + 919 = 40436
Step 45: 40436 + 919 = 41355
Step 46: 41355 + 919 = 42274
Step 47: 42274 + 919 = 43193
Step 48: 43193 + 919 = 44112
Step 49: 44112 + 919 = 45031
Step 50: 45031 + 919 = 45950
Step 51: 45950 + 919 = 46869
Step 52: 46869 + 919 = 47788
Step 53: 47788 + 919 = 48707
Step 54: 48707 + 919 = 49626
Step 55: 49626 + 919 = 50545
Step 56: 50545 + 919 = 51464
Step 57: 51464 + 919 = 52383
Step 58: 52383 + 919 = 53302
Step 59: 53302 + 919 = 54221
Step 60: 54221 + 919 = 55140
Step 61: 55140 + 919 = 56059
Step 62: 56059 + 919 = 56978
Step 63: 56978 + 919 = 57897
Step 64: 57897 + 919 = 58816
Step 65: 58816 + 919 = 59735
Step 66: 59735 + 919 = 60654
Step 67: 60654 + 919 = 61573
Step 68: 61573 + 919 = 62492
Step 69: 62492 + 919 = 63411
Step 70: 63411 + 919 = 64330
Step 71: 64330 + 919 = 65249
Step 72: 65249 + 919 = 66168
Step 73: 66168 + 919 = 67087
Step 74: 67087 + 919 = 68006
Step 75: 68006 + 919 = 68925
Step 76: 68925 + 919 = 69844
Step 77: 69844 + 919 = 70763
Step 78: 70763 + 919 = 71682

So, 919*78 = 71682