Let's get this math done. We have 778 and we're going to multiply it by 78. This is the same as taking 778 and adding it to itself 78 times.
Step 1: 0 + 778 = 778
Step 2: 778 + 778 = 1556
Step 3: 1556 + 778 = 2334
Step 4: 2334 + 778 = 3112
Step 5: 3112 + 778 = 3890
Step 6: 3890 + 778 = 4668
Step 7: 4668 + 778 = 5446
Step 8: 5446 + 778 = 6224
Step 9: 6224 + 778 = 7002
Step 10: 7002 + 778 = 7780
Step 11: 7780 + 778 = 8558
Step 12: 8558 + 778 = 9336
Step 13: 9336 + 778 = 10114
Step 14: 10114 + 778 = 10892
Step 15: 10892 + 778 = 11670
Step 16: 11670 + 778 = 12448
Step 17: 12448 + 778 = 13226
Step 18: 13226 + 778 = 14004
Step 19: 14004 + 778 = 14782
Step 20: 14782 + 778 = 15560
Step 21: 15560 + 778 = 16338
Step 22: 16338 + 778 = 17116
Step 23: 17116 + 778 = 17894
Step 24: 17894 + 778 = 18672
Step 25: 18672 + 778 = 19450
Step 26: 19450 + 778 = 20228
Step 27: 20228 + 778 = 21006
Step 28: 21006 + 778 = 21784
Step 29: 21784 + 778 = 22562
Step 30: 22562 + 778 = 23340
Step 31: 23340 + 778 = 24118
Step 32: 24118 + 778 = 24896
Step 33: 24896 + 778 = 25674
Step 34: 25674 + 778 = 26452
Step 35: 26452 + 778 = 27230
Step 36: 27230 + 778 = 28008
Step 37: 28008 + 778 = 28786
Step 38: 28786 + 778 = 29564
Step 39: 29564 + 778 = 30342
Step 40: 30342 + 778 = 31120
Step 41: 31120 + 778 = 31898
Step 42: 31898 + 778 = 32676
Step 43: 32676 + 778 = 33454
Step 44: 33454 + 778 = 34232
Step 45: 34232 + 778 = 35010
Step 46: 35010 + 778 = 35788
Step 47: 35788 + 778 = 36566
Step 48: 36566 + 778 = 37344
Step 49: 37344 + 778 = 38122
Step 50: 38122 + 778 = 38900
Step 51: 38900 + 778 = 39678
Step 52: 39678 + 778 = 40456
Step 53: 40456 + 778 = 41234
Step 54: 41234 + 778 = 42012
Step 55: 42012 + 778 = 42790
Step 56: 42790 + 778 = 43568
Step 57: 43568 + 778 = 44346
Step 58: 44346 + 778 = 45124
Step 59: 45124 + 778 = 45902
Step 60: 45902 + 778 = 46680
Step 61: 46680 + 778 = 47458
Step 62: 47458 + 778 = 48236
Step 63: 48236 + 778 = 49014
Step 64: 49014 + 778 = 49792
Step 65: 49792 + 778 = 50570
Step 66: 50570 + 778 = 51348
Step 67: 51348 + 778 = 52126
Step 68: 52126 + 778 = 52904
Step 69: 52904 + 778 = 53682
Step 70: 53682 + 778 = 54460
Step 71: 54460 + 778 = 55238
Step 72: 55238 + 778 = 56016
Step 73: 56016 + 778 = 56794
Step 74: 56794 + 778 = 57572
Step 75: 57572 + 778 = 58350
Step 76: 58350 + 778 = 59128
Step 77: 59128 + 778 = 59906
Step 78: 59906 + 778 = 60684

So, 778*78 = 60684