OK, let's crack this. We're given 308 and our task is to multiply it by 150. Essentially, we'll be adding 308 to itself 150 times.
Step 1: 0 + 308 = 308
Step 2: 308 + 308 = 616
Step 3: 616 + 308 = 924
Step 4: 924 + 308 = 1232
Step 5: 1232 + 308 = 1540
Step 6: 1540 + 308 = 1848
Step 7: 1848 + 308 = 2156
Step 8: 2156 + 308 = 2464
Step 9: 2464 + 308 = 2772
Step 10: 2772 + 308 = 3080
Step 11: 3080 + 308 = 3388
Step 12: 3388 + 308 = 3696
Step 13: 3696 + 308 = 4004
Step 14: 4004 + 308 = 4312
Step 15: 4312 + 308 = 4620
Step 16: 4620 + 308 = 4928
Step 17: 4928 + 308 = 5236
Step 18: 5236 + 308 = 5544
Step 19: 5544 + 308 = 5852
Step 20: 5852 + 308 = 6160
Step 21: 6160 + 308 = 6468
Step 22: 6468 + 308 = 6776
Step 23: 6776 + 308 = 7084
Step 24: 7084 + 308 = 7392
Step 25: 7392 + 308 = 7700
Step 26: 7700 + 308 = 8008
Step 27: 8008 + 308 = 8316
Step 28: 8316 + 308 = 8624
Step 29: 8624 + 308 = 8932
Step 30: 8932 + 308 = 9240
Step 31: 9240 + 308 = 9548
Step 32: 9548 + 308 = 9856
Step 33: 9856 + 308 = 10164
Step 34: 10164 + 308 = 10472
Step 35: 10472 + 308 = 10780
Step 36: 10780 + 308 = 11088
Step 37: 11088 + 308 = 11396
Step 38: 11396 + 308 = 11704
Step 39: 11704 + 308 = 12012
Step 40: 12012 + 308 = 12320
Step 41: 12320 + 308 = 12628
Step 42: 12628 + 308 = 12936
Step 43: 12936 + 308 = 13244
Step 44: 13244 + 308 = 13552
Step 45: 13552 + 308 = 13860
Step 46: 13860 + 308 = 14168
Step 47: 14168 + 308 = 14476
Step 48: 14476 + 308 = 14784
Step 49: 14784 + 308 = 15092
Step 50: 15092 + 308 = 15400
Step 51: 15400 + 308 = 15708
Step 52: 15708 + 308 = 16016
Step 53: 16016 + 308 = 16324
Step 54: 16324 + 308 = 16632
Step 55: 16632 + 308 = 16940
Step 56: 16940 + 308 = 17248
Step 57: 17248 + 308 = 17556
Step 58: 17556 + 308 = 17864
Step 59: 17864 + 308 = 18172
Step 60: 18172 + 308 = 18480
Step 61: 18480 + 308 = 18788
Step 62: 18788 + 308 = 19096
Step 63: 19096 + 308 = 19404
Step 64: 19404 + 308 = 19712
Step 65: 19712 + 308 = 20020
Step 66: 20020 + 308 = 20328
Step 67: 20328 + 308 = 20636
Step 68: 20636 + 308 = 20944
Step 69: 20944 + 308 = 21252
Step 70: 21252 + 308 = 21560
Step 71: 21560 + 308 = 21868
Step 72: 21868 + 308 = 22176
Step 73: 22176 + 308 = 22484
Step 74: 22484 + 308 = 22792
Step 75: 22792 + 308 = 23100
Step 76: 23100 + 308 = 23408
Step 77: 23408 + 308 = 23716
Step 78: 23716 + 308 = 24024
Step 79: 24024 + 308 = 24332
Step 80: 24332 + 308 = 24640
Step 81: 24640 + 308 = 24948
Step 82: 24948 + 308 = 25256
Step 83: 25256 + 308 = 25564
Step 84: 25564 + 308 = 25872
Step 85: 25872 + 308 = 26180
Step 86: 26180 + 308 = 26488
Step 87: 26488 + 308 = 26796
Step 88: 26796 + 308 = 27104
Step 89: 27104 + 308 = 27412
Step 90: 27412 + 308 = 27720
Step 91: 27720 + 308 = 28028
Step 92: 28028 + 308 = 28336
Step 93: 28336 + 308 = 28644
Step 94: 28644 + 308 = 28952
Step 95: 28952 + 308 = 29260
Step 96: 29260 + 308 = 29568
Step 97: 29568 + 308 = 29876
Step 98: 29876 + 308 = 30184
Step 99: 30184 + 308 = 30492
Step 100: 30492 + 308 = 30800
Step 101: 30800 + 308 = 31108
Step 102: 31108 + 308 = 31416
Step 103: 31416 + 308 = 31724
Step 104: 31724 + 308 = 32032
Step 105: 32032 + 308 = 32340
Step 106: 32340 + 308 = 32648
Step 107: 32648 + 308 = 32956
Step 108: 32956 + 308 = 33264
Step 109: 33264 + 308 = 33572
Step 110: 33572 + 308 = 33880
Step 111: 33880 + 308 = 34188
Step 112: 34188 + 308 = 34496
Step 113: 34496 + 308 = 34804
Step 114: 34804 + 308 = 35112
Step 115: 35112 + 308 = 35420
Step 116: 35420 + 308 = 35728
Step 117: 35728 + 308 = 36036
Step 118: 36036 + 308 = 36344
Step 119: 36344 + 308 = 36652
Step 120: 36652 + 308 = 36960
Step 121: 36960 + 308 = 37268
Step 122: 37268 + 308 = 37576
Step 123: 37576 + 308 = 37884
Step 124: 37884 + 308 = 38192
Step 125: 38192 + 308 = 38500
Step 126: 38500 + 308 = 38808
Step 127: 38808 + 308 = 39116
Step 128: 39116 + 308 = 39424
Step 129: 39424 + 308 = 39732
Step 130: 39732 + 308 = 40040
Step 131: 40040 + 308 = 40348
Step 132: 40348 + 308 = 40656
Step 133: 40656 + 308 = 40964
Step 134: 40964 + 308 = 41272
Step 135: 41272 + 308 = 41580
Step 136: 41580 + 308 = 41888
Step 137: 41888 + 308 = 42196
Step 138: 42196 + 308 = 42504
Step 139: 42504 + 308 = 42812
Step 140: 42812 + 308 = 43120
Step 141: 43120 + 308 = 43428
Step 142: 43428 + 308 = 43736
Step 143: 43736 + 308 = 44044
Step 144: 44044 + 308 = 44352
Step 145: 44352 + 308 = 44660
Step 146: 44660 + 308 = 44968
Step 147: 44968 + 308 = 45276
Step 148: 45276 + 308 = 45584
Step 149: 45584 + 308 = 45892
Step 150: 45892 + 308 = 46200

So, 308*150 = 46200