Let's get this math done. We have 865 and we're going to multiply it by 64. This is the same as taking 865 and adding it to itself 64 times.
Step 1: 0 + 865 = 865
Step 2: 865 + 865 = 1730
Step 3: 1730 + 865 = 2595
Step 4: 2595 + 865 = 3460
Step 5: 3460 + 865 = 4325
Step 6: 4325 + 865 = 5190
Step 7: 5190 + 865 = 6055
Step 8: 6055 + 865 = 6920
Step 9: 6920 + 865 = 7785
Step 10: 7785 + 865 = 8650
Step 11: 8650 + 865 = 9515
Step 12: 9515 + 865 = 10380
Step 13: 10380 + 865 = 11245
Step 14: 11245 + 865 = 12110
Step 15: 12110 + 865 = 12975
Step 16: 12975 + 865 = 13840
Step 17: 13840 + 865 = 14705
Step 18: 14705 + 865 = 15570
Step 19: 15570 + 865 = 16435
Step 20: 16435 + 865 = 17300
Step 21: 17300 + 865 = 18165
Step 22: 18165 + 865 = 19030
Step 23: 19030 + 865 = 19895
Step 24: 19895 + 865 = 20760
Step 25: 20760 + 865 = 21625
Step 26: 21625 + 865 = 22490
Step 27: 22490 + 865 = 23355
Step 28: 23355 + 865 = 24220
Step 29: 24220 + 865 = 25085
Step 30: 25085 + 865 = 25950
Step 31: 25950 + 865 = 26815
Step 32: 26815 + 865 = 27680
Step 33: 27680 + 865 = 28545
Step 34: 28545 + 865 = 29410
Step 35: 29410 + 865 = 30275
Step 36: 30275 + 865 = 31140
Step 37: 31140 + 865 = 32005
Step 38: 32005 + 865 = 32870
Step 39: 32870 + 865 = 33735
Step 40: 33735 + 865 = 34600
Step 41: 34600 + 865 = 35465
Step 42: 35465 + 865 = 36330
Step 43: 36330 + 865 = 37195
Step 44: 37195 + 865 = 38060
Step 45: 38060 + 865 = 38925
Step 46: 38925 + 865 = 39790
Step 47: 39790 + 865 = 40655
Step 48: 40655 + 865 = 41520
Step 49: 41520 + 865 = 42385
Step 50: 42385 + 865 = 43250
Step 51: 43250 + 865 = 44115
Step 52: 44115 + 865 = 44980
Step 53: 44980 + 865 = 45845
Step 54: 45845 + 865 = 46710
Step 55: 46710 + 865 = 47575
Step 56: 47575 + 865 = 48440
Step 57: 48440 + 865 = 49305
Step 58: 49305 + 865 = 50170
Step 59: 50170 + 865 = 51035
Step 60: 51035 + 865 = 51900
Step 61: 51900 + 865 = 52765
Step 62: 52765 + 865 = 53630
Step 63: 53630 + 865 = 54495
Step 64: 54495 + 865 = 55360

So, 865*64 = 55360