Alright, let's solve this math problem step by step. First, we have the number 251. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 172. So, we're going to take the number 251 and add it to itself 172 times.
Step 1: 0 + 251 = 251
Step 2: 251 + 251 = 502
Step 3: 502 + 251 = 753
Step 4: 753 + 251 = 1004
Step 5: 1004 + 251 = 1255
Step 6: 1255 + 251 = 1506
Step 7: 1506 + 251 = 1757
Step 8: 1757 + 251 = 2008
Step 9: 2008 + 251 = 2259
Step 10: 2259 + 251 = 2510
Step 11: 2510 + 251 = 2761
Step 12: 2761 + 251 = 3012
Step 13: 3012 + 251 = 3263
Step 14: 3263 + 251 = 3514
Step 15: 3514 + 251 = 3765
Step 16: 3765 + 251 = 4016
Step 17: 4016 + 251 = 4267
Step 18: 4267 + 251 = 4518
Step 19: 4518 + 251 = 4769
Step 20: 4769 + 251 = 5020
Step 21: 5020 + 251 = 5271
Step 22: 5271 + 251 = 5522
Step 23: 5522 + 251 = 5773
Step 24: 5773 + 251 = 6024
Step 25: 6024 + 251 = 6275
Step 26: 6275 + 251 = 6526
Step 27: 6526 + 251 = 6777
Step 28: 6777 + 251 = 7028
Step 29: 7028 + 251 = 7279
Step 30: 7279 + 251 = 7530
Step 31: 7530 + 251 = 7781
Step 32: 7781 + 251 = 8032
Step 33: 8032 + 251 = 8283
Step 34: 8283 + 251 = 8534
Step 35: 8534 + 251 = 8785
Step 36: 8785 + 251 = 9036
Step 37: 9036 + 251 = 9287
Step 38: 9287 + 251 = 9538
Step 39: 9538 + 251 = 9789
Step 40: 9789 + 251 = 10040
Step 41: 10040 + 251 = 10291
Step 42: 10291 + 251 = 10542
Step 43: 10542 + 251 = 10793
Step 44: 10793 + 251 = 11044
Step 45: 11044 + 251 = 11295
Step 46: 11295 + 251 = 11546
Step 47: 11546 + 251 = 11797
Step 48: 11797 + 251 = 12048
Step 49: 12048 + 251 = 12299
Step 50: 12299 + 251 = 12550
Step 51: 12550 + 251 = 12801
Step 52: 12801 + 251 = 13052
Step 53: 13052 + 251 = 13303
Step 54: 13303 + 251 = 13554
Step 55: 13554 + 251 = 13805
Step 56: 13805 + 251 = 14056
Step 57: 14056 + 251 = 14307
Step 58: 14307 + 251 = 14558
Step 59: 14558 + 251 = 14809
Step 60: 14809 + 251 = 15060
Step 61: 15060 + 251 = 15311
Step 62: 15311 + 251 = 15562
Step 63: 15562 + 251 = 15813
Step 64: 15813 + 251 = 16064
Step 65: 16064 + 251 = 16315
Step 66: 16315 + 251 = 16566
Step 67: 16566 + 251 = 16817
Step 68: 16817 + 251 = 17068
Step 69: 17068 + 251 = 17319
Step 70: 17319 + 251 = 17570
Step 71: 17570 + 251 = 17821
Step 72: 17821 + 251 = 18072
Step 73: 18072 + 251 = 18323
Step 74: 18323 + 251 = 18574
Step 75: 18574 + 251 = 18825
Step 76: 18825 + 251 = 19076
Step 77: 19076 + 251 = 19327
Step 78: 19327 + 251 = 19578
Step 79: 19578 + 251 = 19829
Step 80: 19829 + 251 = 20080
Step 81: 20080 + 251 = 20331
Step 82: 20331 + 251 = 20582
Step 83: 20582 + 251 = 20833
Step 84: 20833 + 251 = 21084
Step 85: 21084 + 251 = 21335
Step 86: 21335 + 251 = 21586
Step 87: 21586 + 251 = 21837
Step 88: 21837 + 251 = 22088
Step 89: 22088 + 251 = 22339
Step 90: 22339 + 251 = 22590
Step 91: 22590 + 251 = 22841
Step 92: 22841 + 251 = 23092
Step 93: 23092 + 251 = 23343
Step 94: 23343 + 251 = 23594
Step 95: 23594 + 251 = 23845
Step 96: 23845 + 251 = 24096
Step 97: 24096 + 251 = 24347
Step 98: 24347 + 251 = 24598
Step 99: 24598 + 251 = 24849
Step 100: 24849 + 251 = 25100
Step 101: 25100 + 251 = 25351
Step 102: 25351 + 251 = 25602
Step 103: 25602 + 251 = 25853
Step 104: 25853 + 251 = 26104
Step 105: 26104 + 251 = 26355
Step 106: 26355 + 251 = 26606
Step 107: 26606 + 251 = 26857
Step 108: 26857 + 251 = 27108
Step 109: 27108 + 251 = 27359
Step 110: 27359 + 251 = 27610
Step 111: 27610 + 251 = 27861
Step 112: 27861 + 251 = 28112
Step 113: 28112 + 251 = 28363
Step 114: 28363 + 251 = 28614
Step 115: 28614 + 251 = 28865
Step 116: 28865 + 251 = 29116
Step 117: 29116 + 251 = 29367
Step 118: 29367 + 251 = 29618
Step 119: 29618 + 251 = 29869
Step 120: 29869 + 251 = 30120
Step 121: 30120 + 251 = 30371
Step 122: 30371 + 251 = 30622
Step 123: 30622 + 251 = 30873
Step 124: 30873 + 251 = 31124
Step 125: 31124 + 251 = 31375
Step 126: 31375 + 251 = 31626
Step 127: 31626 + 251 = 31877
Step 128: 31877 + 251 = 32128
Step 129: 32128 + 251 = 32379
Step 130: 32379 + 251 = 32630
Step 131: 32630 + 251 = 32881
Step 132: 32881 + 251 = 33132
Step 133: 33132 + 251 = 33383
Step 134: 33383 + 251 = 33634
Step 135: 33634 + 251 = 33885
Step 136: 33885 + 251 = 34136
Step 137: 34136 + 251 = 34387
Step 138: 34387 + 251 = 34638
Step 139: 34638 + 251 = 34889
Step 140: 34889 + 251 = 35140
Step 141: 35140 + 251 = 35391
Step 142: 35391 + 251 = 35642
Step 143: 35642 + 251 = 35893
Step 144: 35893 + 251 = 36144
Step 145: 36144 + 251 = 36395
Step 146: 36395 + 251 = 36646
Step 147: 36646 + 251 = 36897
Step 148: 36897 + 251 = 37148
Step 149: 37148 + 251 = 37399
Step 150: 37399 + 251 = 37650
Step 151: 37650 + 251 = 37901
Step 152: 37901 + 251 = 38152
Step 153: 38152 + 251 = 38403
Step 154: 38403 + 251 = 38654
Step 155: 38654 + 251 = 38905
Step 156: 38905 + 251 = 39156
Step 157: 39156 + 251 = 39407
Step 158: 39407 + 251 = 39658
Step 159: 39658 + 251 = 39909
Step 160: 39909 + 251 = 40160
Step 161: 40160 + 251 = 40411
Step 162: 40411 + 251 = 40662
Step 163: 40662 + 251 = 40913
Step 164: 40913 + 251 = 41164
Step 165: 41164 + 251 = 41415
Step 166: 41415 + 251 = 41666
Step 167: 41666 + 251 = 41917
Step 168: 41917 + 251 = 42168
Step 169: 42168 + 251 = 42419
Step 170: 42419 + 251 = 42670
Step 171: 42670 + 251 = 42921
Step 172: 42921 + 251 = 43172

So, 251*172 = 43172