Alright, let's solve this math problem step by step. First, we have the number 231. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 89. So, we're going to take the number 231 and add it to itself 89 times.
Step 1: 0 + 231 = 231
Step 2: 231 + 231 = 462
Step 3: 462 + 231 = 693
Step 4: 693 + 231 = 924
Step 5: 924 + 231 = 1155
Step 6: 1155 + 231 = 1386
Step 7: 1386 + 231 = 1617
Step 8: 1617 + 231 = 1848
Step 9: 1848 + 231 = 2079
Step 10: 2079 + 231 = 2310
Step 11: 2310 + 231 = 2541
Step 12: 2541 + 231 = 2772
Step 13: 2772 + 231 = 3003
Step 14: 3003 + 231 = 3234
Step 15: 3234 + 231 = 3465
Step 16: 3465 + 231 = 3696
Step 17: 3696 + 231 = 3927
Step 18: 3927 + 231 = 4158
Step 19: 4158 + 231 = 4389
Step 20: 4389 + 231 = 4620
Step 21: 4620 + 231 = 4851
Step 22: 4851 + 231 = 5082
Step 23: 5082 + 231 = 5313
Step 24: 5313 + 231 = 5544
Step 25: 5544 + 231 = 5775
Step 26: 5775 + 231 = 6006
Step 27: 6006 + 231 = 6237
Step 28: 6237 + 231 = 6468
Step 29: 6468 + 231 = 6699
Step 30: 6699 + 231 = 6930
Step 31: 6930 + 231 = 7161
Step 32: 7161 + 231 = 7392
Step 33: 7392 + 231 = 7623
Step 34: 7623 + 231 = 7854
Step 35: 7854 + 231 = 8085
Step 36: 8085 + 231 = 8316
Step 37: 8316 + 231 = 8547
Step 38: 8547 + 231 = 8778
Step 39: 8778 + 231 = 9009
Step 40: 9009 + 231 = 9240
Step 41: 9240 + 231 = 9471
Step 42: 9471 + 231 = 9702
Step 43: 9702 + 231 = 9933
Step 44: 9933 + 231 = 10164
Step 45: 10164 + 231 = 10395
Step 46: 10395 + 231 = 10626
Step 47: 10626 + 231 = 10857
Step 48: 10857 + 231 = 11088
Step 49: 11088 + 231 = 11319
Step 50: 11319 + 231 = 11550
Step 51: 11550 + 231 = 11781
Step 52: 11781 + 231 = 12012
Step 53: 12012 + 231 = 12243
Step 54: 12243 + 231 = 12474
Step 55: 12474 + 231 = 12705
Step 56: 12705 + 231 = 12936
Step 57: 12936 + 231 = 13167
Step 58: 13167 + 231 = 13398
Step 59: 13398 + 231 = 13629
Step 60: 13629 + 231 = 13860
Step 61: 13860 + 231 = 14091
Step 62: 14091 + 231 = 14322
Step 63: 14322 + 231 = 14553
Step 64: 14553 + 231 = 14784
Step 65: 14784 + 231 = 15015
Step 66: 15015 + 231 = 15246
Step 67: 15246 + 231 = 15477
Step 68: 15477 + 231 = 15708
Step 69: 15708 + 231 = 15939
Step 70: 15939 + 231 = 16170
Step 71: 16170 + 231 = 16401
Step 72: 16401 + 231 = 16632
Step 73: 16632 + 231 = 16863
Step 74: 16863 + 231 = 17094
Step 75: 17094 + 231 = 17325
Step 76: 17325 + 231 = 17556
Step 77: 17556 + 231 = 17787
Step 78: 17787 + 231 = 18018
Step 79: 18018 + 231 = 18249
Step 80: 18249 + 231 = 18480
Step 81: 18480 + 231 = 18711
Step 82: 18711 + 231 = 18942
Step 83: 18942 + 231 = 19173
Step 84: 19173 + 231 = 19404
Step 85: 19404 + 231 = 19635
Step 86: 19635 + 231 = 19866
Step 87: 19866 + 231 = 20097
Step 88: 20097 + 231 = 20328
Step 89: 20328 + 231 = 20559

So, 231*89 = 20559