Let's roll up our sleeves and solve this. We have 51 and we're going to multiply it by 37, essentially adding 51 to itself 37 times.
Step 1: 0 + 51 = 51
Step 2: 51 + 51 = 102
Step 3: 102 + 51 = 153
Step 4: 153 + 51 = 204
Step 5: 204 + 51 = 255
Step 6: 255 + 51 = 306
Step 7: 306 + 51 = 357
Step 8: 357 + 51 = 408
Step 9: 408 + 51 = 459
Step 10: 459 + 51 = 510
Step 11: 510 + 51 = 561
Step 12: 561 + 51 = 612
Step 13: 612 + 51 = 663
Step 14: 663 + 51 = 714
Step 15: 714 + 51 = 765
Step 16: 765 + 51 = 816
Step 17: 816 + 51 = 867
Step 18: 867 + 51 = 918
Step 19: 918 + 51 = 969
Step 20: 969 + 51 = 1020
Step 21: 1020 + 51 = 1071
Step 22: 1071 + 51 = 1122
Step 23: 1122 + 51 = 1173
Step 24: 1173 + 51 = 1224
Step 25: 1224 + 51 = 1275
Step 26: 1275 + 51 = 1326
Step 27: 1326 + 51 = 1377
Step 28: 1377 + 51 = 1428
Step 29: 1428 + 51 = 1479
Step 30: 1479 + 51 = 1530
Step 31: 1530 + 51 = 1581
Step 32: 1581 + 51 = 1632
Step 33: 1632 + 51 = 1683
Step 34: 1683 + 51 = 1734
Step 35: 1734 + 51 = 1785
Step 36: 1785 + 51 = 1836
Step 37: 1836 + 51 = 1887

So, 51*37 = 1887