OK, let's work through this together. We're starting with 366 and we're going to multiply it by 135, which means we add 366 to itself 135 times.
Step 1: 0 + 366 = 366
Step 2: 366 + 366 = 732
Step 3: 732 + 366 = 1098
Step 4: 1098 + 366 = 1464
Step 5: 1464 + 366 = 1830
Step 6: 1830 + 366 = 2196
Step 7: 2196 + 366 = 2562
Step 8: 2562 + 366 = 2928
Step 9: 2928 + 366 = 3294
Step 10: 3294 + 366 = 3660
Step 11: 3660 + 366 = 4026
Step 12: 4026 + 366 = 4392
Step 13: 4392 + 366 = 4758
Step 14: 4758 + 366 = 5124
Step 15: 5124 + 366 = 5490
Step 16: 5490 + 366 = 5856
Step 17: 5856 + 366 = 6222
Step 18: 6222 + 366 = 6588
Step 19: 6588 + 366 = 6954
Step 20: 6954 + 366 = 7320
Step 21: 7320 + 366 = 7686
Step 22: 7686 + 366 = 8052
Step 23: 8052 + 366 = 8418
Step 24: 8418 + 366 = 8784
Step 25: 8784 + 366 = 9150
Step 26: 9150 + 366 = 9516
Step 27: 9516 + 366 = 9882
Step 28: 9882 + 366 = 10248
Step 29: 10248 + 366 = 10614
Step 30: 10614 + 366 = 10980
Step 31: 10980 + 366 = 11346
Step 32: 11346 + 366 = 11712
Step 33: 11712 + 366 = 12078
Step 34: 12078 + 366 = 12444
Step 35: 12444 + 366 = 12810
Step 36: 12810 + 366 = 13176
Step 37: 13176 + 366 = 13542
Step 38: 13542 + 366 = 13908
Step 39: 13908 + 366 = 14274
Step 40: 14274 + 366 = 14640
Step 41: 14640 + 366 = 15006
Step 42: 15006 + 366 = 15372
Step 43: 15372 + 366 = 15738
Step 44: 15738 + 366 = 16104
Step 45: 16104 + 366 = 16470
Step 46: 16470 + 366 = 16836
Step 47: 16836 + 366 = 17202
Step 48: 17202 + 366 = 17568
Step 49: 17568 + 366 = 17934
Step 50: 17934 + 366 = 18300
Step 51: 18300 + 366 = 18666
Step 52: 18666 + 366 = 19032
Step 53: 19032 + 366 = 19398
Step 54: 19398 + 366 = 19764
Step 55: 19764 + 366 = 20130
Step 56: 20130 + 366 = 20496
Step 57: 20496 + 366 = 20862
Step 58: 20862 + 366 = 21228
Step 59: 21228 + 366 = 21594
Step 60: 21594 + 366 = 21960
Step 61: 21960 + 366 = 22326
Step 62: 22326 + 366 = 22692
Step 63: 22692 + 366 = 23058
Step 64: 23058 + 366 = 23424
Step 65: 23424 + 366 = 23790
Step 66: 23790 + 366 = 24156
Step 67: 24156 + 366 = 24522
Step 68: 24522 + 366 = 24888
Step 69: 24888 + 366 = 25254
Step 70: 25254 + 366 = 25620
Step 71: 25620 + 366 = 25986
Step 72: 25986 + 366 = 26352
Step 73: 26352 + 366 = 26718
Step 74: 26718 + 366 = 27084
Step 75: 27084 + 366 = 27450
Step 76: 27450 + 366 = 27816
Step 77: 27816 + 366 = 28182
Step 78: 28182 + 366 = 28548
Step 79: 28548 + 366 = 28914
Step 80: 28914 + 366 = 29280
Step 81: 29280 + 366 = 29646
Step 82: 29646 + 366 = 30012
Step 83: 30012 + 366 = 30378
Step 84: 30378 + 366 = 30744
Step 85: 30744 + 366 = 31110
Step 86: 31110 + 366 = 31476
Step 87: 31476 + 366 = 31842
Step 88: 31842 + 366 = 32208
Step 89: 32208 + 366 = 32574
Step 90: 32574 + 366 = 32940
Step 91: 32940 + 366 = 33306
Step 92: 33306 + 366 = 33672
Step 93: 33672 + 366 = 34038
Step 94: 34038 + 366 = 34404
Step 95: 34404 + 366 = 34770
Step 96: 34770 + 366 = 35136
Step 97: 35136 + 366 = 35502
Step 98: 35502 + 366 = 35868
Step 99: 35868 + 366 = 36234
Step 100: 36234 + 366 = 36600
Step 101: 36600 + 366 = 36966
Step 102: 36966 + 366 = 37332
Step 103: 37332 + 366 = 37698
Step 104: 37698 + 366 = 38064
Step 105: 38064 + 366 = 38430
Step 106: 38430 + 366 = 38796
Step 107: 38796 + 366 = 39162
Step 108: 39162 + 366 = 39528
Step 109: 39528 + 366 = 39894
Step 110: 39894 + 366 = 40260
Step 111: 40260 + 366 = 40626
Step 112: 40626 + 366 = 40992
Step 113: 40992 + 366 = 41358
Step 114: 41358 + 366 = 41724
Step 115: 41724 + 366 = 42090
Step 116: 42090 + 366 = 42456
Step 117: 42456 + 366 = 42822
Step 118: 42822 + 366 = 43188
Step 119: 43188 + 366 = 43554
Step 120: 43554 + 366 = 43920
Step 121: 43920 + 366 = 44286
Step 122: 44286 + 366 = 44652
Step 123: 44652 + 366 = 45018
Step 124: 45018 + 366 = 45384
Step 125: 45384 + 366 = 45750
Step 126: 45750 + 366 = 46116
Step 127: 46116 + 366 = 46482
Step 128: 46482 + 366 = 46848
Step 129: 46848 + 366 = 47214
Step 130: 47214 + 366 = 47580
Step 131: 47580 + 366 = 47946
Step 132: 47946 + 366 = 48312
Step 133: 48312 + 366 = 48678
Step 134: 48678 + 366 = 49044
Step 135: 49044 + 366 = 49410

So, 366*135 = 49410