Let's get this math done. We have 307 and we're going to multiply it by 161. This is the same as taking 307 and adding it to itself 161 times.
Step 1: 0 + 307 = 307
Step 2: 307 + 307 = 614
Step 3: 614 + 307 = 921
Step 4: 921 + 307 = 1228
Step 5: 1228 + 307 = 1535
Step 6: 1535 + 307 = 1842
Step 7: 1842 + 307 = 2149
Step 8: 2149 + 307 = 2456
Step 9: 2456 + 307 = 2763
Step 10: 2763 + 307 = 3070
Step 11: 3070 + 307 = 3377
Step 12: 3377 + 307 = 3684
Step 13: 3684 + 307 = 3991
Step 14: 3991 + 307 = 4298
Step 15: 4298 + 307 = 4605
Step 16: 4605 + 307 = 4912
Step 17: 4912 + 307 = 5219
Step 18: 5219 + 307 = 5526
Step 19: 5526 + 307 = 5833
Step 20: 5833 + 307 = 6140
Step 21: 6140 + 307 = 6447
Step 22: 6447 + 307 = 6754
Step 23: 6754 + 307 = 7061
Step 24: 7061 + 307 = 7368
Step 25: 7368 + 307 = 7675
Step 26: 7675 + 307 = 7982
Step 27: 7982 + 307 = 8289
Step 28: 8289 + 307 = 8596
Step 29: 8596 + 307 = 8903
Step 30: 8903 + 307 = 9210
Step 31: 9210 + 307 = 9517
Step 32: 9517 + 307 = 9824
Step 33: 9824 + 307 = 10131
Step 34: 10131 + 307 = 10438
Step 35: 10438 + 307 = 10745
Step 36: 10745 + 307 = 11052
Step 37: 11052 + 307 = 11359
Step 38: 11359 + 307 = 11666
Step 39: 11666 + 307 = 11973
Step 40: 11973 + 307 = 12280
Step 41: 12280 + 307 = 12587
Step 42: 12587 + 307 = 12894
Step 43: 12894 + 307 = 13201
Step 44: 13201 + 307 = 13508
Step 45: 13508 + 307 = 13815
Step 46: 13815 + 307 = 14122
Step 47: 14122 + 307 = 14429
Step 48: 14429 + 307 = 14736
Step 49: 14736 + 307 = 15043
Step 50: 15043 + 307 = 15350
Step 51: 15350 + 307 = 15657
Step 52: 15657 + 307 = 15964
Step 53: 15964 + 307 = 16271
Step 54: 16271 + 307 = 16578
Step 55: 16578 + 307 = 16885
Step 56: 16885 + 307 = 17192
Step 57: 17192 + 307 = 17499
Step 58: 17499 + 307 = 17806
Step 59: 17806 + 307 = 18113
Step 60: 18113 + 307 = 18420
Step 61: 18420 + 307 = 18727
Step 62: 18727 + 307 = 19034
Step 63: 19034 + 307 = 19341
Step 64: 19341 + 307 = 19648
Step 65: 19648 + 307 = 19955
Step 66: 19955 + 307 = 20262
Step 67: 20262 + 307 = 20569
Step 68: 20569 + 307 = 20876
Step 69: 20876 + 307 = 21183
Step 70: 21183 + 307 = 21490
Step 71: 21490 + 307 = 21797
Step 72: 21797 + 307 = 22104
Step 73: 22104 + 307 = 22411
Step 74: 22411 + 307 = 22718
Step 75: 22718 + 307 = 23025
Step 76: 23025 + 307 = 23332
Step 77: 23332 + 307 = 23639
Step 78: 23639 + 307 = 23946
Step 79: 23946 + 307 = 24253
Step 80: 24253 + 307 = 24560
Step 81: 24560 + 307 = 24867
Step 82: 24867 + 307 = 25174
Step 83: 25174 + 307 = 25481
Step 84: 25481 + 307 = 25788
Step 85: 25788 + 307 = 26095
Step 86: 26095 + 307 = 26402
Step 87: 26402 + 307 = 26709
Step 88: 26709 + 307 = 27016
Step 89: 27016 + 307 = 27323
Step 90: 27323 + 307 = 27630
Step 91: 27630 + 307 = 27937
Step 92: 27937 + 307 = 28244
Step 93: 28244 + 307 = 28551
Step 94: 28551 + 307 = 28858
Step 95: 28858 + 307 = 29165
Step 96: 29165 + 307 = 29472
Step 97: 29472 + 307 = 29779
Step 98: 29779 + 307 = 30086
Step 99: 30086 + 307 = 30393
Step 100: 30393 + 307 = 30700
Step 101: 30700 + 307 = 31007
Step 102: 31007 + 307 = 31314
Step 103: 31314 + 307 = 31621
Step 104: 31621 + 307 = 31928
Step 105: 31928 + 307 = 32235
Step 106: 32235 + 307 = 32542
Step 107: 32542 + 307 = 32849
Step 108: 32849 + 307 = 33156
Step 109: 33156 + 307 = 33463
Step 110: 33463 + 307 = 33770
Step 111: 33770 + 307 = 34077
Step 112: 34077 + 307 = 34384
Step 113: 34384 + 307 = 34691
Step 114: 34691 + 307 = 34998
Step 115: 34998 + 307 = 35305
Step 116: 35305 + 307 = 35612
Step 117: 35612 + 307 = 35919
Step 118: 35919 + 307 = 36226
Step 119: 36226 + 307 = 36533
Step 120: 36533 + 307 = 36840
Step 121: 36840 + 307 = 37147
Step 122: 37147 + 307 = 37454
Step 123: 37454 + 307 = 37761
Step 124: 37761 + 307 = 38068
Step 125: 38068 + 307 = 38375
Step 126: 38375 + 307 = 38682
Step 127: 38682 + 307 = 38989
Step 128: 38989 + 307 = 39296
Step 129: 39296 + 307 = 39603
Step 130: 39603 + 307 = 39910
Step 131: 39910 + 307 = 40217
Step 132: 40217 + 307 = 40524
Step 133: 40524 + 307 = 40831
Step 134: 40831 + 307 = 41138
Step 135: 41138 + 307 = 41445
Step 136: 41445 + 307 = 41752
Step 137: 41752 + 307 = 42059
Step 138: 42059 + 307 = 42366
Step 139: 42366 + 307 = 42673
Step 140: 42673 + 307 = 42980
Step 141: 42980 + 307 = 43287
Step 142: 43287 + 307 = 43594
Step 143: 43594 + 307 = 43901
Step 144: 43901 + 307 = 44208
Step 145: 44208 + 307 = 44515
Step 146: 44515 + 307 = 44822
Step 147: 44822 + 307 = 45129
Step 148: 45129 + 307 = 45436
Step 149: 45436 + 307 = 45743
Step 150: 45743 + 307 = 46050
Step 151: 46050 + 307 = 46357
Step 152: 46357 + 307 = 46664
Step 153: 46664 + 307 = 46971
Step 154: 46971 + 307 = 47278
Step 155: 47278 + 307 = 47585
Step 156: 47585 + 307 = 47892
Step 157: 47892 + 307 = 48199
Step 158: 48199 + 307 = 48506
Step 159: 48506 + 307 = 48813
Step 160: 48813 + 307 = 49120
Step 161: 49120 + 307 = 49427

So, 307*161 = 49427