OK, let's work through this together. We're starting with 434 and we're going to multiply it by 166, which means we add 434 to itself 166 times.
Step 1: 0 + 434 = 434
Step 2: 434 + 434 = 868
Step 3: 868 + 434 = 1302
Step 4: 1302 + 434 = 1736
Step 5: 1736 + 434 = 2170
Step 6: 2170 + 434 = 2604
Step 7: 2604 + 434 = 3038
Step 8: 3038 + 434 = 3472
Step 9: 3472 + 434 = 3906
Step 10: 3906 + 434 = 4340
Step 11: 4340 + 434 = 4774
Step 12: 4774 + 434 = 5208
Step 13: 5208 + 434 = 5642
Step 14: 5642 + 434 = 6076
Step 15: 6076 + 434 = 6510
Step 16: 6510 + 434 = 6944
Step 17: 6944 + 434 = 7378
Step 18: 7378 + 434 = 7812
Step 19: 7812 + 434 = 8246
Step 20: 8246 + 434 = 8680
Step 21: 8680 + 434 = 9114
Step 22: 9114 + 434 = 9548
Step 23: 9548 + 434 = 9982
Step 24: 9982 + 434 = 10416
Step 25: 10416 + 434 = 10850
Step 26: 10850 + 434 = 11284
Step 27: 11284 + 434 = 11718
Step 28: 11718 + 434 = 12152
Step 29: 12152 + 434 = 12586
Step 30: 12586 + 434 = 13020
Step 31: 13020 + 434 = 13454
Step 32: 13454 + 434 = 13888
Step 33: 13888 + 434 = 14322
Step 34: 14322 + 434 = 14756
Step 35: 14756 + 434 = 15190
Step 36: 15190 + 434 = 15624
Step 37: 15624 + 434 = 16058
Step 38: 16058 + 434 = 16492
Step 39: 16492 + 434 = 16926
Step 40: 16926 + 434 = 17360
Step 41: 17360 + 434 = 17794
Step 42: 17794 + 434 = 18228
Step 43: 18228 + 434 = 18662
Step 44: 18662 + 434 = 19096
Step 45: 19096 + 434 = 19530
Step 46: 19530 + 434 = 19964
Step 47: 19964 + 434 = 20398
Step 48: 20398 + 434 = 20832
Step 49: 20832 + 434 = 21266
Step 50: 21266 + 434 = 21700
Step 51: 21700 + 434 = 22134
Step 52: 22134 + 434 = 22568
Step 53: 22568 + 434 = 23002
Step 54: 23002 + 434 = 23436
Step 55: 23436 + 434 = 23870
Step 56: 23870 + 434 = 24304
Step 57: 24304 + 434 = 24738
Step 58: 24738 + 434 = 25172
Step 59: 25172 + 434 = 25606
Step 60: 25606 + 434 = 26040
Step 61: 26040 + 434 = 26474
Step 62: 26474 + 434 = 26908
Step 63: 26908 + 434 = 27342
Step 64: 27342 + 434 = 27776
Step 65: 27776 + 434 = 28210
Step 66: 28210 + 434 = 28644
Step 67: 28644 + 434 = 29078
Step 68: 29078 + 434 = 29512
Step 69: 29512 + 434 = 29946
Step 70: 29946 + 434 = 30380
Step 71: 30380 + 434 = 30814
Step 72: 30814 + 434 = 31248
Step 73: 31248 + 434 = 31682
Step 74: 31682 + 434 = 32116
Step 75: 32116 + 434 = 32550
Step 76: 32550 + 434 = 32984
Step 77: 32984 + 434 = 33418
Step 78: 33418 + 434 = 33852
Step 79: 33852 + 434 = 34286
Step 80: 34286 + 434 = 34720
Step 81: 34720 + 434 = 35154
Step 82: 35154 + 434 = 35588
Step 83: 35588 + 434 = 36022
Step 84: 36022 + 434 = 36456
Step 85: 36456 + 434 = 36890
Step 86: 36890 + 434 = 37324
Step 87: 37324 + 434 = 37758
Step 88: 37758 + 434 = 38192
Step 89: 38192 + 434 = 38626
Step 90: 38626 + 434 = 39060
Step 91: 39060 + 434 = 39494
Step 92: 39494 + 434 = 39928
Step 93: 39928 + 434 = 40362
Step 94: 40362 + 434 = 40796
Step 95: 40796 + 434 = 41230
Step 96: 41230 + 434 = 41664
Step 97: 41664 + 434 = 42098
Step 98: 42098 + 434 = 42532
Step 99: 42532 + 434 = 42966
Step 100: 42966 + 434 = 43400
Step 101: 43400 + 434 = 43834
Step 102: 43834 + 434 = 44268
Step 103: 44268 + 434 = 44702
Step 104: 44702 + 434 = 45136
Step 105: 45136 + 434 = 45570
Step 106: 45570 + 434 = 46004
Step 107: 46004 + 434 = 46438
Step 108: 46438 + 434 = 46872
Step 109: 46872 + 434 = 47306
Step 110: 47306 + 434 = 47740
Step 111: 47740 + 434 = 48174
Step 112: 48174 + 434 = 48608
Step 113: 48608 + 434 = 49042
Step 114: 49042 + 434 = 49476
Step 115: 49476 + 434 = 49910
Step 116: 49910 + 434 = 50344
Step 117: 50344 + 434 = 50778
Step 118: 50778 + 434 = 51212
Step 119: 51212 + 434 = 51646
Step 120: 51646 + 434 = 52080
Step 121: 52080 + 434 = 52514
Step 122: 52514 + 434 = 52948
Step 123: 52948 + 434 = 53382
Step 124: 53382 + 434 = 53816
Step 125: 53816 + 434 = 54250
Step 126: 54250 + 434 = 54684
Step 127: 54684 + 434 = 55118
Step 128: 55118 + 434 = 55552
Step 129: 55552 + 434 = 55986
Step 130: 55986 + 434 = 56420
Step 131: 56420 + 434 = 56854
Step 132: 56854 + 434 = 57288
Step 133: 57288 + 434 = 57722
Step 134: 57722 + 434 = 58156
Step 135: 58156 + 434 = 58590
Step 136: 58590 + 434 = 59024
Step 137: 59024 + 434 = 59458
Step 138: 59458 + 434 = 59892
Step 139: 59892 + 434 = 60326
Step 140: 60326 + 434 = 60760
Step 141: 60760 + 434 = 61194
Step 142: 61194 + 434 = 61628
Step 143: 61628 + 434 = 62062
Step 144: 62062 + 434 = 62496
Step 145: 62496 + 434 = 62930
Step 146: 62930 + 434 = 63364
Step 147: 63364 + 434 = 63798
Step 148: 63798 + 434 = 64232
Step 149: 64232 + 434 = 64666
Step 150: 64666 + 434 = 65100
Step 151: 65100 + 434 = 65534
Step 152: 65534 + 434 = 65968
Step 153: 65968 + 434 = 66402
Step 154: 66402 + 434 = 66836
Step 155: 66836 + 434 = 67270
Step 156: 67270 + 434 = 67704
Step 157: 67704 + 434 = 68138
Step 158: 68138 + 434 = 68572
Step 159: 68572 + 434 = 69006
Step 160: 69006 + 434 = 69440
Step 161: 69440 + 434 = 69874
Step 162: 69874 + 434 = 70308
Step 163: 70308 + 434 = 70742
Step 164: 70742 + 434 = 71176
Step 165: 71176 + 434 = 71610
Step 166: 71610 + 434 = 72044

So, 434*166 = 72044