Let's roll up our sleeves and solve this. We have 582 and we're going to multiply it by 145, essentially adding 582 to itself 145 times.
Step 1: 0 + 582 = 582
Step 2: 582 + 582 = 1164
Step 3: 1164 + 582 = 1746
Step 4: 1746 + 582 = 2328
Step 5: 2328 + 582 = 2910
Step 6: 2910 + 582 = 3492
Step 7: 3492 + 582 = 4074
Step 8: 4074 + 582 = 4656
Step 9: 4656 + 582 = 5238
Step 10: 5238 + 582 = 5820
Step 11: 5820 + 582 = 6402
Step 12: 6402 + 582 = 6984
Step 13: 6984 + 582 = 7566
Step 14: 7566 + 582 = 8148
Step 15: 8148 + 582 = 8730
Step 16: 8730 + 582 = 9312
Step 17: 9312 + 582 = 9894
Step 18: 9894 + 582 = 10476
Step 19: 10476 + 582 = 11058
Step 20: 11058 + 582 = 11640
Step 21: 11640 + 582 = 12222
Step 22: 12222 + 582 = 12804
Step 23: 12804 + 582 = 13386
Step 24: 13386 + 582 = 13968
Step 25: 13968 + 582 = 14550
Step 26: 14550 + 582 = 15132
Step 27: 15132 + 582 = 15714
Step 28: 15714 + 582 = 16296
Step 29: 16296 + 582 = 16878
Step 30: 16878 + 582 = 17460
Step 31: 17460 + 582 = 18042
Step 32: 18042 + 582 = 18624
Step 33: 18624 + 582 = 19206
Step 34: 19206 + 582 = 19788
Step 35: 19788 + 582 = 20370
Step 36: 20370 + 582 = 20952
Step 37: 20952 + 582 = 21534
Step 38: 21534 + 582 = 22116
Step 39: 22116 + 582 = 22698
Step 40: 22698 + 582 = 23280
Step 41: 23280 + 582 = 23862
Step 42: 23862 + 582 = 24444
Step 43: 24444 + 582 = 25026
Step 44: 25026 + 582 = 25608
Step 45: 25608 + 582 = 26190
Step 46: 26190 + 582 = 26772
Step 47: 26772 + 582 = 27354
Step 48: 27354 + 582 = 27936
Step 49: 27936 + 582 = 28518
Step 50: 28518 + 582 = 29100
Step 51: 29100 + 582 = 29682
Step 52: 29682 + 582 = 30264
Step 53: 30264 + 582 = 30846
Step 54: 30846 + 582 = 31428
Step 55: 31428 + 582 = 32010
Step 56: 32010 + 582 = 32592
Step 57: 32592 + 582 = 33174
Step 58: 33174 + 582 = 33756
Step 59: 33756 + 582 = 34338
Step 60: 34338 + 582 = 34920
Step 61: 34920 + 582 = 35502
Step 62: 35502 + 582 = 36084
Step 63: 36084 + 582 = 36666
Step 64: 36666 + 582 = 37248
Step 65: 37248 + 582 = 37830
Step 66: 37830 + 582 = 38412
Step 67: 38412 + 582 = 38994
Step 68: 38994 + 582 = 39576
Step 69: 39576 + 582 = 40158
Step 70: 40158 + 582 = 40740
Step 71: 40740 + 582 = 41322
Step 72: 41322 + 582 = 41904
Step 73: 41904 + 582 = 42486
Step 74: 42486 + 582 = 43068
Step 75: 43068 + 582 = 43650
Step 76: 43650 + 582 = 44232
Step 77: 44232 + 582 = 44814
Step 78: 44814 + 582 = 45396
Step 79: 45396 + 582 = 45978
Step 80: 45978 + 582 = 46560
Step 81: 46560 + 582 = 47142
Step 82: 47142 + 582 = 47724
Step 83: 47724 + 582 = 48306
Step 84: 48306 + 582 = 48888
Step 85: 48888 + 582 = 49470
Step 86: 49470 + 582 = 50052
Step 87: 50052 + 582 = 50634
Step 88: 50634 + 582 = 51216
Step 89: 51216 + 582 = 51798
Step 90: 51798 + 582 = 52380
Step 91: 52380 + 582 = 52962
Step 92: 52962 + 582 = 53544
Step 93: 53544 + 582 = 54126
Step 94: 54126 + 582 = 54708
Step 95: 54708 + 582 = 55290
Step 96: 55290 + 582 = 55872
Step 97: 55872 + 582 = 56454
Step 98: 56454 + 582 = 57036
Step 99: 57036 + 582 = 57618
Step 100: 57618 + 582 = 58200
Step 101: 58200 + 582 = 58782
Step 102: 58782 + 582 = 59364
Step 103: 59364 + 582 = 59946
Step 104: 59946 + 582 = 60528
Step 105: 60528 + 582 = 61110
Step 106: 61110 + 582 = 61692
Step 107: 61692 + 582 = 62274
Step 108: 62274 + 582 = 62856
Step 109: 62856 + 582 = 63438
Step 110: 63438 + 582 = 64020
Step 111: 64020 + 582 = 64602
Step 112: 64602 + 582 = 65184
Step 113: 65184 + 582 = 65766
Step 114: 65766 + 582 = 66348
Step 115: 66348 + 582 = 66930
Step 116: 66930 + 582 = 67512
Step 117: 67512 + 582 = 68094
Step 118: 68094 + 582 = 68676
Step 119: 68676 + 582 = 69258
Step 120: 69258 + 582 = 69840
Step 121: 69840 + 582 = 70422
Step 122: 70422 + 582 = 71004
Step 123: 71004 + 582 = 71586
Step 124: 71586 + 582 = 72168
Step 125: 72168 + 582 = 72750
Step 126: 72750 + 582 = 73332
Step 127: 73332 + 582 = 73914
Step 128: 73914 + 582 = 74496
Step 129: 74496 + 582 = 75078
Step 130: 75078 + 582 = 75660
Step 131: 75660 + 582 = 76242
Step 132: 76242 + 582 = 76824
Step 133: 76824 + 582 = 77406
Step 134: 77406 + 582 = 77988
Step 135: 77988 + 582 = 78570
Step 136: 78570 + 582 = 79152
Step 137: 79152 + 582 = 79734
Step 138: 79734 + 582 = 80316
Step 139: 80316 + 582 = 80898
Step 140: 80898 + 582 = 81480
Step 141: 81480 + 582 = 82062
Step 142: 82062 + 582 = 82644
Step 143: 82644 + 582 = 83226
Step 144: 83226 + 582 = 83808
Step 145: 83808 + 582 = 84390

So, 582*145 = 84390