OK, let's crack this. We're given 104 and our task is to multiply it by 113. Essentially, we'll be adding 104 to itself 113 times.
Step 1: 0 + 104 = 104
Step 2: 104 + 104 = 208
Step 3: 208 + 104 = 312
Step 4: 312 + 104 = 416
Step 5: 416 + 104 = 520
Step 6: 520 + 104 = 624
Step 7: 624 + 104 = 728
Step 8: 728 + 104 = 832
Step 9: 832 + 104 = 936
Step 10: 936 + 104 = 1040
Step 11: 1040 + 104 = 1144
Step 12: 1144 + 104 = 1248
Step 13: 1248 + 104 = 1352
Step 14: 1352 + 104 = 1456
Step 15: 1456 + 104 = 1560
Step 16: 1560 + 104 = 1664
Step 17: 1664 + 104 = 1768
Step 18: 1768 + 104 = 1872
Step 19: 1872 + 104 = 1976
Step 20: 1976 + 104 = 2080
Step 21: 2080 + 104 = 2184
Step 22: 2184 + 104 = 2288
Step 23: 2288 + 104 = 2392
Step 24: 2392 + 104 = 2496
Step 25: 2496 + 104 = 2600
Step 26: 2600 + 104 = 2704
Step 27: 2704 + 104 = 2808
Step 28: 2808 + 104 = 2912
Step 29: 2912 + 104 = 3016
Step 30: 3016 + 104 = 3120
Step 31: 3120 + 104 = 3224
Step 32: 3224 + 104 = 3328
Step 33: 3328 + 104 = 3432
Step 34: 3432 + 104 = 3536
Step 35: 3536 + 104 = 3640
Step 36: 3640 + 104 = 3744
Step 37: 3744 + 104 = 3848
Step 38: 3848 + 104 = 3952
Step 39: 3952 + 104 = 4056
Step 40: 4056 + 104 = 4160
Step 41: 4160 + 104 = 4264
Step 42: 4264 + 104 = 4368
Step 43: 4368 + 104 = 4472
Step 44: 4472 + 104 = 4576
Step 45: 4576 + 104 = 4680
Step 46: 4680 + 104 = 4784
Step 47: 4784 + 104 = 4888
Step 48: 4888 + 104 = 4992
Step 49: 4992 + 104 = 5096
Step 50: 5096 + 104 = 5200
Step 51: 5200 + 104 = 5304
Step 52: 5304 + 104 = 5408
Step 53: 5408 + 104 = 5512
Step 54: 5512 + 104 = 5616
Step 55: 5616 + 104 = 5720
Step 56: 5720 + 104 = 5824
Step 57: 5824 + 104 = 5928
Step 58: 5928 + 104 = 6032
Step 59: 6032 + 104 = 6136
Step 60: 6136 + 104 = 6240
Step 61: 6240 + 104 = 6344
Step 62: 6344 + 104 = 6448
Step 63: 6448 + 104 = 6552
Step 64: 6552 + 104 = 6656
Step 65: 6656 + 104 = 6760
Step 66: 6760 + 104 = 6864
Step 67: 6864 + 104 = 6968
Step 68: 6968 + 104 = 7072
Step 69: 7072 + 104 = 7176
Step 70: 7176 + 104 = 7280
Step 71: 7280 + 104 = 7384
Step 72: 7384 + 104 = 7488
Step 73: 7488 + 104 = 7592
Step 74: 7592 + 104 = 7696
Step 75: 7696 + 104 = 7800
Step 76: 7800 + 104 = 7904
Step 77: 7904 + 104 = 8008
Step 78: 8008 + 104 = 8112
Step 79: 8112 + 104 = 8216
Step 80: 8216 + 104 = 8320
Step 81: 8320 + 104 = 8424
Step 82: 8424 + 104 = 8528
Step 83: 8528 + 104 = 8632
Step 84: 8632 + 104 = 8736
Step 85: 8736 + 104 = 8840
Step 86: 8840 + 104 = 8944
Step 87: 8944 + 104 = 9048
Step 88: 9048 + 104 = 9152
Step 89: 9152 + 104 = 9256
Step 90: 9256 + 104 = 9360
Step 91: 9360 + 104 = 9464
Step 92: 9464 + 104 = 9568
Step 93: 9568 + 104 = 9672
Step 94: 9672 + 104 = 9776
Step 95: 9776 + 104 = 9880
Step 96: 9880 + 104 = 9984
Step 97: 9984 + 104 = 10088
Step 98: 10088 + 104 = 10192
Step 99: 10192 + 104 = 10296
Step 100: 10296 + 104 = 10400
Step 101: 10400 + 104 = 10504
Step 102: 10504 + 104 = 10608
Step 103: 10608 + 104 = 10712
Step 104: 10712 + 104 = 10816
Step 105: 10816 + 104 = 10920
Step 106: 10920 + 104 = 11024
Step 107: 11024 + 104 = 11128
Step 108: 11128 + 104 = 11232
Step 109: 11232 + 104 = 11336
Step 110: 11336 + 104 = 11440
Step 111: 11440 + 104 = 11544
Step 112: 11544 + 104 = 11648
Step 113: 11648 + 104 = 11752

So, 104*113 = 11752