OK, let's work through this together. We're starting with 516 and we're going to multiply it by 64, which means we add 516 to itself 64 times.
Step 1: 0 + 516 = 516
Step 2: 516 + 516 = 1032
Step 3: 1032 + 516 = 1548
Step 4: 1548 + 516 = 2064
Step 5: 2064 + 516 = 2580
Step 6: 2580 + 516 = 3096
Step 7: 3096 + 516 = 3612
Step 8: 3612 + 516 = 4128
Step 9: 4128 + 516 = 4644
Step 10: 4644 + 516 = 5160
Step 11: 5160 + 516 = 5676
Step 12: 5676 + 516 = 6192
Step 13: 6192 + 516 = 6708
Step 14: 6708 + 516 = 7224
Step 15: 7224 + 516 = 7740
Step 16: 7740 + 516 = 8256
Step 17: 8256 + 516 = 8772
Step 18: 8772 + 516 = 9288
Step 19: 9288 + 516 = 9804
Step 20: 9804 + 516 = 10320
Step 21: 10320 + 516 = 10836
Step 22: 10836 + 516 = 11352
Step 23: 11352 + 516 = 11868
Step 24: 11868 + 516 = 12384
Step 25: 12384 + 516 = 12900
Step 26: 12900 + 516 = 13416
Step 27: 13416 + 516 = 13932
Step 28: 13932 + 516 = 14448
Step 29: 14448 + 516 = 14964
Step 30: 14964 + 516 = 15480
Step 31: 15480 + 516 = 15996
Step 32: 15996 + 516 = 16512
Step 33: 16512 + 516 = 17028
Step 34: 17028 + 516 = 17544
Step 35: 17544 + 516 = 18060
Step 36: 18060 + 516 = 18576
Step 37: 18576 + 516 = 19092
Step 38: 19092 + 516 = 19608
Step 39: 19608 + 516 = 20124
Step 40: 20124 + 516 = 20640
Step 41: 20640 + 516 = 21156
Step 42: 21156 + 516 = 21672
Step 43: 21672 + 516 = 22188
Step 44: 22188 + 516 = 22704
Step 45: 22704 + 516 = 23220
Step 46: 23220 + 516 = 23736
Step 47: 23736 + 516 = 24252
Step 48: 24252 + 516 = 24768
Step 49: 24768 + 516 = 25284
Step 50: 25284 + 516 = 25800
Step 51: 25800 + 516 = 26316
Step 52: 26316 + 516 = 26832
Step 53: 26832 + 516 = 27348
Step 54: 27348 + 516 = 27864
Step 55: 27864 + 516 = 28380
Step 56: 28380 + 516 = 28896
Step 57: 28896 + 516 = 29412
Step 58: 29412 + 516 = 29928
Step 59: 29928 + 516 = 30444
Step 60: 30444 + 516 = 30960
Step 61: 30960 + 516 = 31476
Step 62: 31476 + 516 = 31992
Step 63: 31992 + 516 = 32508
Step 64: 32508 + 516 = 33024

So, 516*64 = 33024