Alright, let's solve this math problem step by step. First, we have the number 686. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 107. So, we're going to take the number 686 and add it to itself 107 times.
Step 1: 0 + 686 = 686
Step 2: 686 + 686 = 1372
Step 3: 1372 + 686 = 2058
Step 4: 2058 + 686 = 2744
Step 5: 2744 + 686 = 3430
Step 6: 3430 + 686 = 4116
Step 7: 4116 + 686 = 4802
Step 8: 4802 + 686 = 5488
Step 9: 5488 + 686 = 6174
Step 10: 6174 + 686 = 6860
Step 11: 6860 + 686 = 7546
Step 12: 7546 + 686 = 8232
Step 13: 8232 + 686 = 8918
Step 14: 8918 + 686 = 9604
Step 15: 9604 + 686 = 10290
Step 16: 10290 + 686 = 10976
Step 17: 10976 + 686 = 11662
Step 18: 11662 + 686 = 12348
Step 19: 12348 + 686 = 13034
Step 20: 13034 + 686 = 13720
Step 21: 13720 + 686 = 14406
Step 22: 14406 + 686 = 15092
Step 23: 15092 + 686 = 15778
Step 24: 15778 + 686 = 16464
Step 25: 16464 + 686 = 17150
Step 26: 17150 + 686 = 17836
Step 27: 17836 + 686 = 18522
Step 28: 18522 + 686 = 19208
Step 29: 19208 + 686 = 19894
Step 30: 19894 + 686 = 20580
Step 31: 20580 + 686 = 21266
Step 32: 21266 + 686 = 21952
Step 33: 21952 + 686 = 22638
Step 34: 22638 + 686 = 23324
Step 35: 23324 + 686 = 24010
Step 36: 24010 + 686 = 24696
Step 37: 24696 + 686 = 25382
Step 38: 25382 + 686 = 26068
Step 39: 26068 + 686 = 26754
Step 40: 26754 + 686 = 27440
Step 41: 27440 + 686 = 28126
Step 42: 28126 + 686 = 28812
Step 43: 28812 + 686 = 29498
Step 44: 29498 + 686 = 30184
Step 45: 30184 + 686 = 30870
Step 46: 30870 + 686 = 31556
Step 47: 31556 + 686 = 32242
Step 48: 32242 + 686 = 32928
Step 49: 32928 + 686 = 33614
Step 50: 33614 + 686 = 34300
Step 51: 34300 + 686 = 34986
Step 52: 34986 + 686 = 35672
Step 53: 35672 + 686 = 36358
Step 54: 36358 + 686 = 37044
Step 55: 37044 + 686 = 37730
Step 56: 37730 + 686 = 38416
Step 57: 38416 + 686 = 39102
Step 58: 39102 + 686 = 39788
Step 59: 39788 + 686 = 40474
Step 60: 40474 + 686 = 41160
Step 61: 41160 + 686 = 41846
Step 62: 41846 + 686 = 42532
Step 63: 42532 + 686 = 43218
Step 64: 43218 + 686 = 43904
Step 65: 43904 + 686 = 44590
Step 66: 44590 + 686 = 45276
Step 67: 45276 + 686 = 45962
Step 68: 45962 + 686 = 46648
Step 69: 46648 + 686 = 47334
Step 70: 47334 + 686 = 48020
Step 71: 48020 + 686 = 48706
Step 72: 48706 + 686 = 49392
Step 73: 49392 + 686 = 50078
Step 74: 50078 + 686 = 50764
Step 75: 50764 + 686 = 51450
Step 76: 51450 + 686 = 52136
Step 77: 52136 + 686 = 52822
Step 78: 52822 + 686 = 53508
Step 79: 53508 + 686 = 54194
Step 80: 54194 + 686 = 54880
Step 81: 54880 + 686 = 55566
Step 82: 55566 + 686 = 56252
Step 83: 56252 + 686 = 56938
Step 84: 56938 + 686 = 57624
Step 85: 57624 + 686 = 58310
Step 86: 58310 + 686 = 58996
Step 87: 58996 + 686 = 59682
Step 88: 59682 + 686 = 60368
Step 89: 60368 + 686 = 61054
Step 90: 61054 + 686 = 61740
Step 91: 61740 + 686 = 62426
Step 92: 62426 + 686 = 63112
Step 93: 63112 + 686 = 63798
Step 94: 63798 + 686 = 64484
Step 95: 64484 + 686 = 65170
Step 96: 65170 + 686 = 65856
Step 97: 65856 + 686 = 66542
Step 98: 66542 + 686 = 67228
Step 99: 67228 + 686 = 67914
Step 100: 67914 + 686 = 68600
Step 101: 68600 + 686 = 69286
Step 102: 69286 + 686 = 69972
Step 103: 69972 + 686 = 70658
Step 104: 70658 + 686 = 71344
Step 105: 71344 + 686 = 72030
Step 106: 72030 + 686 = 72716
Step 107: 72716 + 686 = 73402

So, 686*107 = 73402