Sure thing! We've got 143 and we're gonna multiply it by 61. That's the same as adding 143 to itself 61 times.
Step 1: 0 + 143 = 143
Step 2: 143 + 143 = 286
Step 3: 286 + 143 = 429
Step 4: 429 + 143 = 572
Step 5: 572 + 143 = 715
Step 6: 715 + 143 = 858
Step 7: 858 + 143 = 1001
Step 8: 1001 + 143 = 1144
Step 9: 1144 + 143 = 1287
Step 10: 1287 + 143 = 1430
Step 11: 1430 + 143 = 1573
Step 12: 1573 + 143 = 1716
Step 13: 1716 + 143 = 1859
Step 14: 1859 + 143 = 2002
Step 15: 2002 + 143 = 2145
Step 16: 2145 + 143 = 2288
Step 17: 2288 + 143 = 2431
Step 18: 2431 + 143 = 2574
Step 19: 2574 + 143 = 2717
Step 20: 2717 + 143 = 2860
Step 21: 2860 + 143 = 3003
Step 22: 3003 + 143 = 3146
Step 23: 3146 + 143 = 3289
Step 24: 3289 + 143 = 3432
Step 25: 3432 + 143 = 3575
Step 26: 3575 + 143 = 3718
Step 27: 3718 + 143 = 3861
Step 28: 3861 + 143 = 4004
Step 29: 4004 + 143 = 4147
Step 30: 4147 + 143 = 4290
Step 31: 4290 + 143 = 4433
Step 32: 4433 + 143 = 4576
Step 33: 4576 + 143 = 4719
Step 34: 4719 + 143 = 4862
Step 35: 4862 + 143 = 5005
Step 36: 5005 + 143 = 5148
Step 37: 5148 + 143 = 5291
Step 38: 5291 + 143 = 5434
Step 39: 5434 + 143 = 5577
Step 40: 5577 + 143 = 5720
Step 41: 5720 + 143 = 5863
Step 42: 5863 + 143 = 6006
Step 43: 6006 + 143 = 6149
Step 44: 6149 + 143 = 6292
Step 45: 6292 + 143 = 6435
Step 46: 6435 + 143 = 6578
Step 47: 6578 + 143 = 6721
Step 48: 6721 + 143 = 6864
Step 49: 6864 + 143 = 7007
Step 50: 7007 + 143 = 7150
Step 51: 7150 + 143 = 7293
Step 52: 7293 + 143 = 7436
Step 53: 7436 + 143 = 7579
Step 54: 7579 + 143 = 7722
Step 55: 7722 + 143 = 7865
Step 56: 7865 + 143 = 8008
Step 57: 8008 + 143 = 8151
Step 58: 8151 + 143 = 8294
Step 59: 8294 + 143 = 8437
Step 60: 8437 + 143 = 8580
Step 61: 8580 + 143 = 8723

So, 143*61 = 8723