Sure thing, let's get straight to it. We start with 392 and we're going to multiply it by 64, which means adding 392 to itself 64 times.
Step 1: 0 + 392 = 392
Step 2: 392 + 392 = 784
Step 3: 784 + 392 = 1176
Step 4: 1176 + 392 = 1568
Step 5: 1568 + 392 = 1960
Step 6: 1960 + 392 = 2352
Step 7: 2352 + 392 = 2744
Step 8: 2744 + 392 = 3136
Step 9: 3136 + 392 = 3528
Step 10: 3528 + 392 = 3920
Step 11: 3920 + 392 = 4312
Step 12: 4312 + 392 = 4704
Step 13: 4704 + 392 = 5096
Step 14: 5096 + 392 = 5488
Step 15: 5488 + 392 = 5880
Step 16: 5880 + 392 = 6272
Step 17: 6272 + 392 = 6664
Step 18: 6664 + 392 = 7056
Step 19: 7056 + 392 = 7448
Step 20: 7448 + 392 = 7840
Step 21: 7840 + 392 = 8232
Step 22: 8232 + 392 = 8624
Step 23: 8624 + 392 = 9016
Step 24: 9016 + 392 = 9408
Step 25: 9408 + 392 = 9800
Step 26: 9800 + 392 = 10192
Step 27: 10192 + 392 = 10584
Step 28: 10584 + 392 = 10976
Step 29: 10976 + 392 = 11368
Step 30: 11368 + 392 = 11760
Step 31: 11760 + 392 = 12152
Step 32: 12152 + 392 = 12544
Step 33: 12544 + 392 = 12936
Step 34: 12936 + 392 = 13328
Step 35: 13328 + 392 = 13720
Step 36: 13720 + 392 = 14112
Step 37: 14112 + 392 = 14504
Step 38: 14504 + 392 = 14896
Step 39: 14896 + 392 = 15288
Step 40: 15288 + 392 = 15680
Step 41: 15680 + 392 = 16072
Step 42: 16072 + 392 = 16464
Step 43: 16464 + 392 = 16856
Step 44: 16856 + 392 = 17248
Step 45: 17248 + 392 = 17640
Step 46: 17640 + 392 = 18032
Step 47: 18032 + 392 = 18424
Step 48: 18424 + 392 = 18816
Step 49: 18816 + 392 = 19208
Step 50: 19208 + 392 = 19600
Step 51: 19600 + 392 = 19992
Step 52: 19992 + 392 = 20384
Step 53: 20384 + 392 = 20776
Step 54: 20776 + 392 = 21168
Step 55: 21168 + 392 = 21560
Step 56: 21560 + 392 = 21952
Step 57: 21952 + 392 = 22344
Step 58: 22344 + 392 = 22736
Step 59: 22736 + 392 = 23128
Step 60: 23128 + 392 = 23520
Step 61: 23520 + 392 = 23912
Step 62: 23912 + 392 = 24304
Step 63: 24304 + 392 = 24696
Step 64: 24696 + 392 = 25088

So, 392*64 = 25088