Alright, let's solve this math problem step by step. First, we have the number 689. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 81. So, we're going to take the number 689 and add it to itself 81 times.
Step 1: 0 + 689 = 689
Step 2: 689 + 689 = 1378
Step 3: 1378 + 689 = 2067
Step 4: 2067 + 689 = 2756
Step 5: 2756 + 689 = 3445
Step 6: 3445 + 689 = 4134
Step 7: 4134 + 689 = 4823
Step 8: 4823 + 689 = 5512
Step 9: 5512 + 689 = 6201
Step 10: 6201 + 689 = 6890
Step 11: 6890 + 689 = 7579
Step 12: 7579 + 689 = 8268
Step 13: 8268 + 689 = 8957
Step 14: 8957 + 689 = 9646
Step 15: 9646 + 689 = 10335
Step 16: 10335 + 689 = 11024
Step 17: 11024 + 689 = 11713
Step 18: 11713 + 689 = 12402
Step 19: 12402 + 689 = 13091
Step 20: 13091 + 689 = 13780
Step 21: 13780 + 689 = 14469
Step 22: 14469 + 689 = 15158
Step 23: 15158 + 689 = 15847
Step 24: 15847 + 689 = 16536
Step 25: 16536 + 689 = 17225
Step 26: 17225 + 689 = 17914
Step 27: 17914 + 689 = 18603
Step 28: 18603 + 689 = 19292
Step 29: 19292 + 689 = 19981
Step 30: 19981 + 689 = 20670
Step 31: 20670 + 689 = 21359
Step 32: 21359 + 689 = 22048
Step 33: 22048 + 689 = 22737
Step 34: 22737 + 689 = 23426
Step 35: 23426 + 689 = 24115
Step 36: 24115 + 689 = 24804
Step 37: 24804 + 689 = 25493
Step 38: 25493 + 689 = 26182
Step 39: 26182 + 689 = 26871
Step 40: 26871 + 689 = 27560
Step 41: 27560 + 689 = 28249
Step 42: 28249 + 689 = 28938
Step 43: 28938 + 689 = 29627
Step 44: 29627 + 689 = 30316
Step 45: 30316 + 689 = 31005
Step 46: 31005 + 689 = 31694
Step 47: 31694 + 689 = 32383
Step 48: 32383 + 689 = 33072
Step 49: 33072 + 689 = 33761
Step 50: 33761 + 689 = 34450
Step 51: 34450 + 689 = 35139
Step 52: 35139 + 689 = 35828
Step 53: 35828 + 689 = 36517
Step 54: 36517 + 689 = 37206
Step 55: 37206 + 689 = 37895
Step 56: 37895 + 689 = 38584
Step 57: 38584 + 689 = 39273
Step 58: 39273 + 689 = 39962
Step 59: 39962 + 689 = 40651
Step 60: 40651 + 689 = 41340
Step 61: 41340 + 689 = 42029
Step 62: 42029 + 689 = 42718
Step 63: 42718 + 689 = 43407
Step 64: 43407 + 689 = 44096
Step 65: 44096 + 689 = 44785
Step 66: 44785 + 689 = 45474
Step 67: 45474 + 689 = 46163
Step 68: 46163 + 689 = 46852
Step 69: 46852 + 689 = 47541
Step 70: 47541 + 689 = 48230
Step 71: 48230 + 689 = 48919
Step 72: 48919 + 689 = 49608
Step 73: 49608 + 689 = 50297
Step 74: 50297 + 689 = 50986
Step 75: 50986 + 689 = 51675
Step 76: 51675 + 689 = 52364
Step 77: 52364 + 689 = 53053
Step 78: 53053 + 689 = 53742
Step 79: 53742 + 689 = 54431
Step 80: 54431 + 689 = 55120
Step 81: 55120 + 689 = 55809

So, 689*81 = 55809