OK, let's crack this. We're given 44 and our task is to multiply it by 91. Essentially, we'll be adding 44 to itself 91 times.
Step 1: 0 + 44 = 44
Step 2: 44 + 44 = 88
Step 3: 88 + 44 = 132
Step 4: 132 + 44 = 176
Step 5: 176 + 44 = 220
Step 6: 220 + 44 = 264
Step 7: 264 + 44 = 308
Step 8: 308 + 44 = 352
Step 9: 352 + 44 = 396
Step 10: 396 + 44 = 440
Step 11: 440 + 44 = 484
Step 12: 484 + 44 = 528
Step 13: 528 + 44 = 572
Step 14: 572 + 44 = 616
Step 15: 616 + 44 = 660
Step 16: 660 + 44 = 704
Step 17: 704 + 44 = 748
Step 18: 748 + 44 = 792
Step 19: 792 + 44 = 836
Step 20: 836 + 44 = 880
Step 21: 880 + 44 = 924
Step 22: 924 + 44 = 968
Step 23: 968 + 44 = 1012
Step 24: 1012 + 44 = 1056
Step 25: 1056 + 44 = 1100
Step 26: 1100 + 44 = 1144
Step 27: 1144 + 44 = 1188
Step 28: 1188 + 44 = 1232
Step 29: 1232 + 44 = 1276
Step 30: 1276 + 44 = 1320
Step 31: 1320 + 44 = 1364
Step 32: 1364 + 44 = 1408
Step 33: 1408 + 44 = 1452
Step 34: 1452 + 44 = 1496
Step 35: 1496 + 44 = 1540
Step 36: 1540 + 44 = 1584
Step 37: 1584 + 44 = 1628
Step 38: 1628 + 44 = 1672
Step 39: 1672 + 44 = 1716
Step 40: 1716 + 44 = 1760
Step 41: 1760 + 44 = 1804
Step 42: 1804 + 44 = 1848
Step 43: 1848 + 44 = 1892
Step 44: 1892 + 44 = 1936
Step 45: 1936 + 44 = 1980
Step 46: 1980 + 44 = 2024
Step 47: 2024 + 44 = 2068
Step 48: 2068 + 44 = 2112
Step 49: 2112 + 44 = 2156
Step 50: 2156 + 44 = 2200
Step 51: 2200 + 44 = 2244
Step 52: 2244 + 44 = 2288
Step 53: 2288 + 44 = 2332
Step 54: 2332 + 44 = 2376
Step 55: 2376 + 44 = 2420
Step 56: 2420 + 44 = 2464
Step 57: 2464 + 44 = 2508
Step 58: 2508 + 44 = 2552
Step 59: 2552 + 44 = 2596
Step 60: 2596 + 44 = 2640
Step 61: 2640 + 44 = 2684
Step 62: 2684 + 44 = 2728
Step 63: 2728 + 44 = 2772
Step 64: 2772 + 44 = 2816
Step 65: 2816 + 44 = 2860
Step 66: 2860 + 44 = 2904
Step 67: 2904 + 44 = 2948
Step 68: 2948 + 44 = 2992
Step 69: 2992 + 44 = 3036
Step 70: 3036 + 44 = 3080
Step 71: 3080 + 44 = 3124
Step 72: 3124 + 44 = 3168
Step 73: 3168 + 44 = 3212
Step 74: 3212 + 44 = 3256
Step 75: 3256 + 44 = 3300
Step 76: 3300 + 44 = 3344
Step 77: 3344 + 44 = 3388
Step 78: 3388 + 44 = 3432
Step 79: 3432 + 44 = 3476
Step 80: 3476 + 44 = 3520
Step 81: 3520 + 44 = 3564
Step 82: 3564 + 44 = 3608
Step 83: 3608 + 44 = 3652
Step 84: 3652 + 44 = 3696
Step 85: 3696 + 44 = 3740
Step 86: 3740 + 44 = 3784
Step 87: 3784 + 44 = 3828
Step 88: 3828 + 44 = 3872
Step 89: 3872 + 44 = 3916
Step 90: 3916 + 44 = 3960
Step 91: 3960 + 44 = 4004

So, 44*91 = 4004