Let's roll up our sleeves and solve this. We have 378 and we're going to multiply it by 161, essentially adding 378 to itself 161 times.
Step 1: 0 + 378 = 378
Step 2: 378 + 378 = 756
Step 3: 756 + 378 = 1134
Step 4: 1134 + 378 = 1512
Step 5: 1512 + 378 = 1890
Step 6: 1890 + 378 = 2268
Step 7: 2268 + 378 = 2646
Step 8: 2646 + 378 = 3024
Step 9: 3024 + 378 = 3402
Step 10: 3402 + 378 = 3780
Step 11: 3780 + 378 = 4158
Step 12: 4158 + 378 = 4536
Step 13: 4536 + 378 = 4914
Step 14: 4914 + 378 = 5292
Step 15: 5292 + 378 = 5670
Step 16: 5670 + 378 = 6048
Step 17: 6048 + 378 = 6426
Step 18: 6426 + 378 = 6804
Step 19: 6804 + 378 = 7182
Step 20: 7182 + 378 = 7560
Step 21: 7560 + 378 = 7938
Step 22: 7938 + 378 = 8316
Step 23: 8316 + 378 = 8694
Step 24: 8694 + 378 = 9072
Step 25: 9072 + 378 = 9450
Step 26: 9450 + 378 = 9828
Step 27: 9828 + 378 = 10206
Step 28: 10206 + 378 = 10584
Step 29: 10584 + 378 = 10962
Step 30: 10962 + 378 = 11340
Step 31: 11340 + 378 = 11718
Step 32: 11718 + 378 = 12096
Step 33: 12096 + 378 = 12474
Step 34: 12474 + 378 = 12852
Step 35: 12852 + 378 = 13230
Step 36: 13230 + 378 = 13608
Step 37: 13608 + 378 = 13986
Step 38: 13986 + 378 = 14364
Step 39: 14364 + 378 = 14742
Step 40: 14742 + 378 = 15120
Step 41: 15120 + 378 = 15498
Step 42: 15498 + 378 = 15876
Step 43: 15876 + 378 = 16254
Step 44: 16254 + 378 = 16632
Step 45: 16632 + 378 = 17010
Step 46: 17010 + 378 = 17388
Step 47: 17388 + 378 = 17766
Step 48: 17766 + 378 = 18144
Step 49: 18144 + 378 = 18522
Step 50: 18522 + 378 = 18900
Step 51: 18900 + 378 = 19278
Step 52: 19278 + 378 = 19656
Step 53: 19656 + 378 = 20034
Step 54: 20034 + 378 = 20412
Step 55: 20412 + 378 = 20790
Step 56: 20790 + 378 = 21168
Step 57: 21168 + 378 = 21546
Step 58: 21546 + 378 = 21924
Step 59: 21924 + 378 = 22302
Step 60: 22302 + 378 = 22680
Step 61: 22680 + 378 = 23058
Step 62: 23058 + 378 = 23436
Step 63: 23436 + 378 = 23814
Step 64: 23814 + 378 = 24192
Step 65: 24192 + 378 = 24570
Step 66: 24570 + 378 = 24948
Step 67: 24948 + 378 = 25326
Step 68: 25326 + 378 = 25704
Step 69: 25704 + 378 = 26082
Step 70: 26082 + 378 = 26460
Step 71: 26460 + 378 = 26838
Step 72: 26838 + 378 = 27216
Step 73: 27216 + 378 = 27594
Step 74: 27594 + 378 = 27972
Step 75: 27972 + 378 = 28350
Step 76: 28350 + 378 = 28728
Step 77: 28728 + 378 = 29106
Step 78: 29106 + 378 = 29484
Step 79: 29484 + 378 = 29862
Step 80: 29862 + 378 = 30240
Step 81: 30240 + 378 = 30618
Step 82: 30618 + 378 = 30996
Step 83: 30996 + 378 = 31374
Step 84: 31374 + 378 = 31752
Step 85: 31752 + 378 = 32130
Step 86: 32130 + 378 = 32508
Step 87: 32508 + 378 = 32886
Step 88: 32886 + 378 = 33264
Step 89: 33264 + 378 = 33642
Step 90: 33642 + 378 = 34020
Step 91: 34020 + 378 = 34398
Step 92: 34398 + 378 = 34776
Step 93: 34776 + 378 = 35154
Step 94: 35154 + 378 = 35532
Step 95: 35532 + 378 = 35910
Step 96: 35910 + 378 = 36288
Step 97: 36288 + 378 = 36666
Step 98: 36666 + 378 = 37044
Step 99: 37044 + 378 = 37422
Step 100: 37422 + 378 = 37800
Step 101: 37800 + 378 = 38178
Step 102: 38178 + 378 = 38556
Step 103: 38556 + 378 = 38934
Step 104: 38934 + 378 = 39312
Step 105: 39312 + 378 = 39690
Step 106: 39690 + 378 = 40068
Step 107: 40068 + 378 = 40446
Step 108: 40446 + 378 = 40824
Step 109: 40824 + 378 = 41202
Step 110: 41202 + 378 = 41580
Step 111: 41580 + 378 = 41958
Step 112: 41958 + 378 = 42336
Step 113: 42336 + 378 = 42714
Step 114: 42714 + 378 = 43092
Step 115: 43092 + 378 = 43470
Step 116: 43470 + 378 = 43848
Step 117: 43848 + 378 = 44226
Step 118: 44226 + 378 = 44604
Step 119: 44604 + 378 = 44982
Step 120: 44982 + 378 = 45360
Step 121: 45360 + 378 = 45738
Step 122: 45738 + 378 = 46116
Step 123: 46116 + 378 = 46494
Step 124: 46494 + 378 = 46872
Step 125: 46872 + 378 = 47250
Step 126: 47250 + 378 = 47628
Step 127: 47628 + 378 = 48006
Step 128: 48006 + 378 = 48384
Step 129: 48384 + 378 = 48762
Step 130: 48762 + 378 = 49140
Step 131: 49140 + 378 = 49518
Step 132: 49518 + 378 = 49896
Step 133: 49896 + 378 = 50274
Step 134: 50274 + 378 = 50652
Step 135: 50652 + 378 = 51030
Step 136: 51030 + 378 = 51408
Step 137: 51408 + 378 = 51786
Step 138: 51786 + 378 = 52164
Step 139: 52164 + 378 = 52542
Step 140: 52542 + 378 = 52920
Step 141: 52920 + 378 = 53298
Step 142: 53298 + 378 = 53676
Step 143: 53676 + 378 = 54054
Step 144: 54054 + 378 = 54432
Step 145: 54432 + 378 = 54810
Step 146: 54810 + 378 = 55188
Step 147: 55188 + 378 = 55566
Step 148: 55566 + 378 = 55944
Step 149: 55944 + 378 = 56322
Step 150: 56322 + 378 = 56700
Step 151: 56700 + 378 = 57078
Step 152: 57078 + 378 = 57456
Step 153: 57456 + 378 = 57834
Step 154: 57834 + 378 = 58212
Step 155: 58212 + 378 = 58590
Step 156: 58590 + 378 = 58968
Step 157: 58968 + 378 = 59346
Step 158: 59346 + 378 = 59724
Step 159: 59724 + 378 = 60102
Step 160: 60102 + 378 = 60480
Step 161: 60480 + 378 = 60858

So, 378*161 = 60858