Alright, let's solve this math problem step by step. First, we have the number 707. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 129. So, we're going to take the number 707 and add it to itself 129 times.
Step 1: 0 + 707 = 707
Step 2: 707 + 707 = 1414
Step 3: 1414 + 707 = 2121
Step 4: 2121 + 707 = 2828
Step 5: 2828 + 707 = 3535
Step 6: 3535 + 707 = 4242
Step 7: 4242 + 707 = 4949
Step 8: 4949 + 707 = 5656
Step 9: 5656 + 707 = 6363
Step 10: 6363 + 707 = 7070
Step 11: 7070 + 707 = 7777
Step 12: 7777 + 707 = 8484
Step 13: 8484 + 707 = 9191
Step 14: 9191 + 707 = 9898
Step 15: 9898 + 707 = 10605
Step 16: 10605 + 707 = 11312
Step 17: 11312 + 707 = 12019
Step 18: 12019 + 707 = 12726
Step 19: 12726 + 707 = 13433
Step 20: 13433 + 707 = 14140
Step 21: 14140 + 707 = 14847
Step 22: 14847 + 707 = 15554
Step 23: 15554 + 707 = 16261
Step 24: 16261 + 707 = 16968
Step 25: 16968 + 707 = 17675
Step 26: 17675 + 707 = 18382
Step 27: 18382 + 707 = 19089
Step 28: 19089 + 707 = 19796
Step 29: 19796 + 707 = 20503
Step 30: 20503 + 707 = 21210
Step 31: 21210 + 707 = 21917
Step 32: 21917 + 707 = 22624
Step 33: 22624 + 707 = 23331
Step 34: 23331 + 707 = 24038
Step 35: 24038 + 707 = 24745
Step 36: 24745 + 707 = 25452
Step 37: 25452 + 707 = 26159
Step 38: 26159 + 707 = 26866
Step 39: 26866 + 707 = 27573
Step 40: 27573 + 707 = 28280
Step 41: 28280 + 707 = 28987
Step 42: 28987 + 707 = 29694
Step 43: 29694 + 707 = 30401
Step 44: 30401 + 707 = 31108
Step 45: 31108 + 707 = 31815
Step 46: 31815 + 707 = 32522
Step 47: 32522 + 707 = 33229
Step 48: 33229 + 707 = 33936
Step 49: 33936 + 707 = 34643
Step 50: 34643 + 707 = 35350
Step 51: 35350 + 707 = 36057
Step 52: 36057 + 707 = 36764
Step 53: 36764 + 707 = 37471
Step 54: 37471 + 707 = 38178
Step 55: 38178 + 707 = 38885
Step 56: 38885 + 707 = 39592
Step 57: 39592 + 707 = 40299
Step 58: 40299 + 707 = 41006
Step 59: 41006 + 707 = 41713
Step 60: 41713 + 707 = 42420
Step 61: 42420 + 707 = 43127
Step 62: 43127 + 707 = 43834
Step 63: 43834 + 707 = 44541
Step 64: 44541 + 707 = 45248
Step 65: 45248 + 707 = 45955
Step 66: 45955 + 707 = 46662
Step 67: 46662 + 707 = 47369
Step 68: 47369 + 707 = 48076
Step 69: 48076 + 707 = 48783
Step 70: 48783 + 707 = 49490
Step 71: 49490 + 707 = 50197
Step 72: 50197 + 707 = 50904
Step 73: 50904 + 707 = 51611
Step 74: 51611 + 707 = 52318
Step 75: 52318 + 707 = 53025
Step 76: 53025 + 707 = 53732
Step 77: 53732 + 707 = 54439
Step 78: 54439 + 707 = 55146
Step 79: 55146 + 707 = 55853
Step 80: 55853 + 707 = 56560
Step 81: 56560 + 707 = 57267
Step 82: 57267 + 707 = 57974
Step 83: 57974 + 707 = 58681
Step 84: 58681 + 707 = 59388
Step 85: 59388 + 707 = 60095
Step 86: 60095 + 707 = 60802
Step 87: 60802 + 707 = 61509
Step 88: 61509 + 707 = 62216
Step 89: 62216 + 707 = 62923
Step 90: 62923 + 707 = 63630
Step 91: 63630 + 707 = 64337
Step 92: 64337 + 707 = 65044
Step 93: 65044 + 707 = 65751
Step 94: 65751 + 707 = 66458
Step 95: 66458 + 707 = 67165
Step 96: 67165 + 707 = 67872
Step 97: 67872 + 707 = 68579
Step 98: 68579 + 707 = 69286
Step 99: 69286 + 707 = 69993
Step 100: 69993 + 707 = 70700
Step 101: 70700 + 707 = 71407
Step 102: 71407 + 707 = 72114
Step 103: 72114 + 707 = 72821
Step 104: 72821 + 707 = 73528
Step 105: 73528 + 707 = 74235
Step 106: 74235 + 707 = 74942
Step 107: 74942 + 707 = 75649
Step 108: 75649 + 707 = 76356
Step 109: 76356 + 707 = 77063
Step 110: 77063 + 707 = 77770
Step 111: 77770 + 707 = 78477
Step 112: 78477 + 707 = 79184
Step 113: 79184 + 707 = 79891
Step 114: 79891 + 707 = 80598
Step 115: 80598 + 707 = 81305
Step 116: 81305 + 707 = 82012
Step 117: 82012 + 707 = 82719
Step 118: 82719 + 707 = 83426
Step 119: 83426 + 707 = 84133
Step 120: 84133 + 707 = 84840
Step 121: 84840 + 707 = 85547
Step 122: 85547 + 707 = 86254
Step 123: 86254 + 707 = 86961
Step 124: 86961 + 707 = 87668
Step 125: 87668 + 707 = 88375
Step 126: 88375 + 707 = 89082
Step 127: 89082 + 707 = 89789
Step 128: 89789 + 707 = 90496
Step 129: 90496 + 707 = 91203

So, 707*129 = 91203