Let's roll up our sleeves and solve this. We have 652 and we're going to multiply it by 84, essentially adding 652 to itself 84 times.
Step 1: 0 + 652 = 652
Step 2: 652 + 652 = 1304
Step 3: 1304 + 652 = 1956
Step 4: 1956 + 652 = 2608
Step 5: 2608 + 652 = 3260
Step 6: 3260 + 652 = 3912
Step 7: 3912 + 652 = 4564
Step 8: 4564 + 652 = 5216
Step 9: 5216 + 652 = 5868
Step 10: 5868 + 652 = 6520
Step 11: 6520 + 652 = 7172
Step 12: 7172 + 652 = 7824
Step 13: 7824 + 652 = 8476
Step 14: 8476 + 652 = 9128
Step 15: 9128 + 652 = 9780
Step 16: 9780 + 652 = 10432
Step 17: 10432 + 652 = 11084
Step 18: 11084 + 652 = 11736
Step 19: 11736 + 652 = 12388
Step 20: 12388 + 652 = 13040
Step 21: 13040 + 652 = 13692
Step 22: 13692 + 652 = 14344
Step 23: 14344 + 652 = 14996
Step 24: 14996 + 652 = 15648
Step 25: 15648 + 652 = 16300
Step 26: 16300 + 652 = 16952
Step 27: 16952 + 652 = 17604
Step 28: 17604 + 652 = 18256
Step 29: 18256 + 652 = 18908
Step 30: 18908 + 652 = 19560
Step 31: 19560 + 652 = 20212
Step 32: 20212 + 652 = 20864
Step 33: 20864 + 652 = 21516
Step 34: 21516 + 652 = 22168
Step 35: 22168 + 652 = 22820
Step 36: 22820 + 652 = 23472
Step 37: 23472 + 652 = 24124
Step 38: 24124 + 652 = 24776
Step 39: 24776 + 652 = 25428
Step 40: 25428 + 652 = 26080
Step 41: 26080 + 652 = 26732
Step 42: 26732 + 652 = 27384
Step 43: 27384 + 652 = 28036
Step 44: 28036 + 652 = 28688
Step 45: 28688 + 652 = 29340
Step 46: 29340 + 652 = 29992
Step 47: 29992 + 652 = 30644
Step 48: 30644 + 652 = 31296
Step 49: 31296 + 652 = 31948
Step 50: 31948 + 652 = 32600
Step 51: 32600 + 652 = 33252
Step 52: 33252 + 652 = 33904
Step 53: 33904 + 652 = 34556
Step 54: 34556 + 652 = 35208
Step 55: 35208 + 652 = 35860
Step 56: 35860 + 652 = 36512
Step 57: 36512 + 652 = 37164
Step 58: 37164 + 652 = 37816
Step 59: 37816 + 652 = 38468
Step 60: 38468 + 652 = 39120
Step 61: 39120 + 652 = 39772
Step 62: 39772 + 652 = 40424
Step 63: 40424 + 652 = 41076
Step 64: 41076 + 652 = 41728
Step 65: 41728 + 652 = 42380
Step 66: 42380 + 652 = 43032
Step 67: 43032 + 652 = 43684
Step 68: 43684 + 652 = 44336
Step 69: 44336 + 652 = 44988
Step 70: 44988 + 652 = 45640
Step 71: 45640 + 652 = 46292
Step 72: 46292 + 652 = 46944
Step 73: 46944 + 652 = 47596
Step 74: 47596 + 652 = 48248
Step 75: 48248 + 652 = 48900
Step 76: 48900 + 652 = 49552
Step 77: 49552 + 652 = 50204
Step 78: 50204 + 652 = 50856
Step 79: 50856 + 652 = 51508
Step 80: 51508 + 652 = 52160
Step 81: 52160 + 652 = 52812
Step 82: 52812 + 652 = 53464
Step 83: 53464 + 652 = 54116
Step 84: 54116 + 652 = 54768

So, 652*84 = 54768