Sure thing! We've got 299 and we're gonna multiply it by 81. That's the same as adding 299 to itself 81 times.
Step 1: 0 + 299 = 299
Step 2: 299 + 299 = 598
Step 3: 598 + 299 = 897
Step 4: 897 + 299 = 1196
Step 5: 1196 + 299 = 1495
Step 6: 1495 + 299 = 1794
Step 7: 1794 + 299 = 2093
Step 8: 2093 + 299 = 2392
Step 9: 2392 + 299 = 2691
Step 10: 2691 + 299 = 2990
Step 11: 2990 + 299 = 3289
Step 12: 3289 + 299 = 3588
Step 13: 3588 + 299 = 3887
Step 14: 3887 + 299 = 4186
Step 15: 4186 + 299 = 4485
Step 16: 4485 + 299 = 4784
Step 17: 4784 + 299 = 5083
Step 18: 5083 + 299 = 5382
Step 19: 5382 + 299 = 5681
Step 20: 5681 + 299 = 5980
Step 21: 5980 + 299 = 6279
Step 22: 6279 + 299 = 6578
Step 23: 6578 + 299 = 6877
Step 24: 6877 + 299 = 7176
Step 25: 7176 + 299 = 7475
Step 26: 7475 + 299 = 7774
Step 27: 7774 + 299 = 8073
Step 28: 8073 + 299 = 8372
Step 29: 8372 + 299 = 8671
Step 30: 8671 + 299 = 8970
Step 31: 8970 + 299 = 9269
Step 32: 9269 + 299 = 9568
Step 33: 9568 + 299 = 9867
Step 34: 9867 + 299 = 10166
Step 35: 10166 + 299 = 10465
Step 36: 10465 + 299 = 10764
Step 37: 10764 + 299 = 11063
Step 38: 11063 + 299 = 11362
Step 39: 11362 + 299 = 11661
Step 40: 11661 + 299 = 11960
Step 41: 11960 + 299 = 12259
Step 42: 12259 + 299 = 12558
Step 43: 12558 + 299 = 12857
Step 44: 12857 + 299 = 13156
Step 45: 13156 + 299 = 13455
Step 46: 13455 + 299 = 13754
Step 47: 13754 + 299 = 14053
Step 48: 14053 + 299 = 14352
Step 49: 14352 + 299 = 14651
Step 50: 14651 + 299 = 14950
Step 51: 14950 + 299 = 15249
Step 52: 15249 + 299 = 15548
Step 53: 15548 + 299 = 15847
Step 54: 15847 + 299 = 16146
Step 55: 16146 + 299 = 16445
Step 56: 16445 + 299 = 16744
Step 57: 16744 + 299 = 17043
Step 58: 17043 + 299 = 17342
Step 59: 17342 + 299 = 17641
Step 60: 17641 + 299 = 17940
Step 61: 17940 + 299 = 18239
Step 62: 18239 + 299 = 18538
Step 63: 18538 + 299 = 18837
Step 64: 18837 + 299 = 19136
Step 65: 19136 + 299 = 19435
Step 66: 19435 + 299 = 19734
Step 67: 19734 + 299 = 20033
Step 68: 20033 + 299 = 20332
Step 69: 20332 + 299 = 20631
Step 70: 20631 + 299 = 20930
Step 71: 20930 + 299 = 21229
Step 72: 21229 + 299 = 21528
Step 73: 21528 + 299 = 21827
Step 74: 21827 + 299 = 22126
Step 75: 22126 + 299 = 22425
Step 76: 22425 + 299 = 22724
Step 77: 22724 + 299 = 23023
Step 78: 23023 + 299 = 23322
Step 79: 23322 + 299 = 23621
Step 80: 23621 + 299 = 23920
Step 81: 23920 + 299 = 24219

So, 299*81 = 24219