Let's get this math done. We have 456 and we're going to multiply it by 173. This is the same as taking 456 and adding it to itself 173 times.
Step 1: 0 + 456 = 456
Step 2: 456 + 456 = 912
Step 3: 912 + 456 = 1368
Step 4: 1368 + 456 = 1824
Step 5: 1824 + 456 = 2280
Step 6: 2280 + 456 = 2736
Step 7: 2736 + 456 = 3192
Step 8: 3192 + 456 = 3648
Step 9: 3648 + 456 = 4104
Step 10: 4104 + 456 = 4560
Step 11: 4560 + 456 = 5016
Step 12: 5016 + 456 = 5472
Step 13: 5472 + 456 = 5928
Step 14: 5928 + 456 = 6384
Step 15: 6384 + 456 = 6840
Step 16: 6840 + 456 = 7296
Step 17: 7296 + 456 = 7752
Step 18: 7752 + 456 = 8208
Step 19: 8208 + 456 = 8664
Step 20: 8664 + 456 = 9120
Step 21: 9120 + 456 = 9576
Step 22: 9576 + 456 = 10032
Step 23: 10032 + 456 = 10488
Step 24: 10488 + 456 = 10944
Step 25: 10944 + 456 = 11400
Step 26: 11400 + 456 = 11856
Step 27: 11856 + 456 = 12312
Step 28: 12312 + 456 = 12768
Step 29: 12768 + 456 = 13224
Step 30: 13224 + 456 = 13680
Step 31: 13680 + 456 = 14136
Step 32: 14136 + 456 = 14592
Step 33: 14592 + 456 = 15048
Step 34: 15048 + 456 = 15504
Step 35: 15504 + 456 = 15960
Step 36: 15960 + 456 = 16416
Step 37: 16416 + 456 = 16872
Step 38: 16872 + 456 = 17328
Step 39: 17328 + 456 = 17784
Step 40: 17784 + 456 = 18240
Step 41: 18240 + 456 = 18696
Step 42: 18696 + 456 = 19152
Step 43: 19152 + 456 = 19608
Step 44: 19608 + 456 = 20064
Step 45: 20064 + 456 = 20520
Step 46: 20520 + 456 = 20976
Step 47: 20976 + 456 = 21432
Step 48: 21432 + 456 = 21888
Step 49: 21888 + 456 = 22344
Step 50: 22344 + 456 = 22800
Step 51: 22800 + 456 = 23256
Step 52: 23256 + 456 = 23712
Step 53: 23712 + 456 = 24168
Step 54: 24168 + 456 = 24624
Step 55: 24624 + 456 = 25080
Step 56: 25080 + 456 = 25536
Step 57: 25536 + 456 = 25992
Step 58: 25992 + 456 = 26448
Step 59: 26448 + 456 = 26904
Step 60: 26904 + 456 = 27360
Step 61: 27360 + 456 = 27816
Step 62: 27816 + 456 = 28272
Step 63: 28272 + 456 = 28728
Step 64: 28728 + 456 = 29184
Step 65: 29184 + 456 = 29640
Step 66: 29640 + 456 = 30096
Step 67: 30096 + 456 = 30552
Step 68: 30552 + 456 = 31008
Step 69: 31008 + 456 = 31464
Step 70: 31464 + 456 = 31920
Step 71: 31920 + 456 = 32376
Step 72: 32376 + 456 = 32832
Step 73: 32832 + 456 = 33288
Step 74: 33288 + 456 = 33744
Step 75: 33744 + 456 = 34200
Step 76: 34200 + 456 = 34656
Step 77: 34656 + 456 = 35112
Step 78: 35112 + 456 = 35568
Step 79: 35568 + 456 = 36024
Step 80: 36024 + 456 = 36480
Step 81: 36480 + 456 = 36936
Step 82: 36936 + 456 = 37392
Step 83: 37392 + 456 = 37848
Step 84: 37848 + 456 = 38304
Step 85: 38304 + 456 = 38760
Step 86: 38760 + 456 = 39216
Step 87: 39216 + 456 = 39672
Step 88: 39672 + 456 = 40128
Step 89: 40128 + 456 = 40584
Step 90: 40584 + 456 = 41040
Step 91: 41040 + 456 = 41496
Step 92: 41496 + 456 = 41952
Step 93: 41952 + 456 = 42408
Step 94: 42408 + 456 = 42864
Step 95: 42864 + 456 = 43320
Step 96: 43320 + 456 = 43776
Step 97: 43776 + 456 = 44232
Step 98: 44232 + 456 = 44688
Step 99: 44688 + 456 = 45144
Step 100: 45144 + 456 = 45600
Step 101: 45600 + 456 = 46056
Step 102: 46056 + 456 = 46512
Step 103: 46512 + 456 = 46968
Step 104: 46968 + 456 = 47424
Step 105: 47424 + 456 = 47880
Step 106: 47880 + 456 = 48336
Step 107: 48336 + 456 = 48792
Step 108: 48792 + 456 = 49248
Step 109: 49248 + 456 = 49704
Step 110: 49704 + 456 = 50160
Step 111: 50160 + 456 = 50616
Step 112: 50616 + 456 = 51072
Step 113: 51072 + 456 = 51528
Step 114: 51528 + 456 = 51984
Step 115: 51984 + 456 = 52440
Step 116: 52440 + 456 = 52896
Step 117: 52896 + 456 = 53352
Step 118: 53352 + 456 = 53808
Step 119: 53808 + 456 = 54264
Step 120: 54264 + 456 = 54720
Step 121: 54720 + 456 = 55176
Step 122: 55176 + 456 = 55632
Step 123: 55632 + 456 = 56088
Step 124: 56088 + 456 = 56544
Step 125: 56544 + 456 = 57000
Step 126: 57000 + 456 = 57456
Step 127: 57456 + 456 = 57912
Step 128: 57912 + 456 = 58368
Step 129: 58368 + 456 = 58824
Step 130: 58824 + 456 = 59280
Step 131: 59280 + 456 = 59736
Step 132: 59736 + 456 = 60192
Step 133: 60192 + 456 = 60648
Step 134: 60648 + 456 = 61104
Step 135: 61104 + 456 = 61560
Step 136: 61560 + 456 = 62016
Step 137: 62016 + 456 = 62472
Step 138: 62472 + 456 = 62928
Step 139: 62928 + 456 = 63384
Step 140: 63384 + 456 = 63840
Step 141: 63840 + 456 = 64296
Step 142: 64296 + 456 = 64752
Step 143: 64752 + 456 = 65208
Step 144: 65208 + 456 = 65664
Step 145: 65664 + 456 = 66120
Step 146: 66120 + 456 = 66576
Step 147: 66576 + 456 = 67032
Step 148: 67032 + 456 = 67488
Step 149: 67488 + 456 = 67944
Step 150: 67944 + 456 = 68400
Step 151: 68400 + 456 = 68856
Step 152: 68856 + 456 = 69312
Step 153: 69312 + 456 = 69768
Step 154: 69768 + 456 = 70224
Step 155: 70224 + 456 = 70680
Step 156: 70680 + 456 = 71136
Step 157: 71136 + 456 = 71592
Step 158: 71592 + 456 = 72048
Step 159: 72048 + 456 = 72504
Step 160: 72504 + 456 = 72960
Step 161: 72960 + 456 = 73416
Step 162: 73416 + 456 = 73872
Step 163: 73872 + 456 = 74328
Step 164: 74328 + 456 = 74784
Step 165: 74784 + 456 = 75240
Step 166: 75240 + 456 = 75696
Step 167: 75696 + 456 = 76152
Step 168: 76152 + 456 = 76608
Step 169: 76608 + 456 = 77064
Step 170: 77064 + 456 = 77520
Step 171: 77520 + 456 = 77976
Step 172: 77976 + 456 = 78432
Step 173: 78432 + 456 = 78888

So, 456*173 = 78888