Let's roll up our sleeves and solve this. We have 201 and we're going to multiply it by 81, essentially adding 201 to itself 81 times.
Step 1: 0 + 201 = 201
Step 2: 201 + 201 = 402
Step 3: 402 + 201 = 603
Step 4: 603 + 201 = 804
Step 5: 804 + 201 = 1005
Step 6: 1005 + 201 = 1206
Step 7: 1206 + 201 = 1407
Step 8: 1407 + 201 = 1608
Step 9: 1608 + 201 = 1809
Step 10: 1809 + 201 = 2010
Step 11: 2010 + 201 = 2211
Step 12: 2211 + 201 = 2412
Step 13: 2412 + 201 = 2613
Step 14: 2613 + 201 = 2814
Step 15: 2814 + 201 = 3015
Step 16: 3015 + 201 = 3216
Step 17: 3216 + 201 = 3417
Step 18: 3417 + 201 = 3618
Step 19: 3618 + 201 = 3819
Step 20: 3819 + 201 = 4020
Step 21: 4020 + 201 = 4221
Step 22: 4221 + 201 = 4422
Step 23: 4422 + 201 = 4623
Step 24: 4623 + 201 = 4824
Step 25: 4824 + 201 = 5025
Step 26: 5025 + 201 = 5226
Step 27: 5226 + 201 = 5427
Step 28: 5427 + 201 = 5628
Step 29: 5628 + 201 = 5829
Step 30: 5829 + 201 = 6030
Step 31: 6030 + 201 = 6231
Step 32: 6231 + 201 = 6432
Step 33: 6432 + 201 = 6633
Step 34: 6633 + 201 = 6834
Step 35: 6834 + 201 = 7035
Step 36: 7035 + 201 = 7236
Step 37: 7236 + 201 = 7437
Step 38: 7437 + 201 = 7638
Step 39: 7638 + 201 = 7839
Step 40: 7839 + 201 = 8040
Step 41: 8040 + 201 = 8241
Step 42: 8241 + 201 = 8442
Step 43: 8442 + 201 = 8643
Step 44: 8643 + 201 = 8844
Step 45: 8844 + 201 = 9045
Step 46: 9045 + 201 = 9246
Step 47: 9246 + 201 = 9447
Step 48: 9447 + 201 = 9648
Step 49: 9648 + 201 = 9849
Step 50: 9849 + 201 = 10050
Step 51: 10050 + 201 = 10251
Step 52: 10251 + 201 = 10452
Step 53: 10452 + 201 = 10653
Step 54: 10653 + 201 = 10854
Step 55: 10854 + 201 = 11055
Step 56: 11055 + 201 = 11256
Step 57: 11256 + 201 = 11457
Step 58: 11457 + 201 = 11658
Step 59: 11658 + 201 = 11859
Step 60: 11859 + 201 = 12060
Step 61: 12060 + 201 = 12261
Step 62: 12261 + 201 = 12462
Step 63: 12462 + 201 = 12663
Step 64: 12663 + 201 = 12864
Step 65: 12864 + 201 = 13065
Step 66: 13065 + 201 = 13266
Step 67: 13266 + 201 = 13467
Step 68: 13467 + 201 = 13668
Step 69: 13668 + 201 = 13869
Step 70: 13869 + 201 = 14070
Step 71: 14070 + 201 = 14271
Step 72: 14271 + 201 = 14472
Step 73: 14472 + 201 = 14673
Step 74: 14673 + 201 = 14874
Step 75: 14874 + 201 = 15075
Step 76: 15075 + 201 = 15276
Step 77: 15276 + 201 = 15477
Step 78: 15477 + 201 = 15678
Step 79: 15678 + 201 = 15879
Step 80: 15879 + 201 = 16080
Step 81: 16080 + 201 = 16281

So, 201*81 = 16281