OK, let's work through this together. We're starting with 409 and we're going to multiply it by 282, which means we add 409 to itself 282 times.
Step 1: 0 + 409 = 409
Step 2: 409 + 409 = 818
Step 3: 818 + 409 = 1227
Step 4: 1227 + 409 = 1636
Step 5: 1636 + 409 = 2045
Step 6: 2045 + 409 = 2454
Step 7: 2454 + 409 = 2863
Step 8: 2863 + 409 = 3272
Step 9: 3272 + 409 = 3681
Step 10: 3681 + 409 = 4090
Step 11: 4090 + 409 = 4499
Step 12: 4499 + 409 = 4908
Step 13: 4908 + 409 = 5317
Step 14: 5317 + 409 = 5726
Step 15: 5726 + 409 = 6135
Step 16: 6135 + 409 = 6544
Step 17: 6544 + 409 = 6953
Step 18: 6953 + 409 = 7362
Step 19: 7362 + 409 = 7771
Step 20: 7771 + 409 = 8180
Step 21: 8180 + 409 = 8589
Step 22: 8589 + 409 = 8998
Step 23: 8998 + 409 = 9407
Step 24: 9407 + 409 = 9816
Step 25: 9816 + 409 = 10225
Step 26: 10225 + 409 = 10634
Step 27: 10634 + 409 = 11043
Step 28: 11043 + 409 = 11452
Step 29: 11452 + 409 = 11861
Step 30: 11861 + 409 = 12270
Step 31: 12270 + 409 = 12679
Step 32: 12679 + 409 = 13088
Step 33: 13088 + 409 = 13497
Step 34: 13497 + 409 = 13906
Step 35: 13906 + 409 = 14315
Step 36: 14315 + 409 = 14724
Step 37: 14724 + 409 = 15133
Step 38: 15133 + 409 = 15542
Step 39: 15542 + 409 = 15951
Step 40: 15951 + 409 = 16360
Step 41: 16360 + 409 = 16769
Step 42: 16769 + 409 = 17178
Step 43: 17178 + 409 = 17587
Step 44: 17587 + 409 = 17996
Step 45: 17996 + 409 = 18405
Step 46: 18405 + 409 = 18814
Step 47: 18814 + 409 = 19223
Step 48: 19223 + 409 = 19632
Step 49: 19632 + 409 = 20041
Step 50: 20041 + 409 = 20450
Step 51: 20450 + 409 = 20859
Step 52: 20859 + 409 = 21268
Step 53: 21268 + 409 = 21677
Step 54: 21677 + 409 = 22086
Step 55: 22086 + 409 = 22495
Step 56: 22495 + 409 = 22904
Step 57: 22904 + 409 = 23313
Step 58: 23313 + 409 = 23722
Step 59: 23722 + 409 = 24131
Step 60: 24131 + 409 = 24540
Step 61: 24540 + 409 = 24949
Step 62: 24949 + 409 = 25358
Step 63: 25358 + 409 = 25767
Step 64: 25767 + 409 = 26176
Step 65: 26176 + 409 = 26585
Step 66: 26585 + 409 = 26994
Step 67: 26994 + 409 = 27403
Step 68: 27403 + 409 = 27812
Step 69: 27812 + 409 = 28221
Step 70: 28221 + 409 = 28630
Step 71: 28630 + 409 = 29039
Step 72: 29039 + 409 = 29448
Step 73: 29448 + 409 = 29857
Step 74: 29857 + 409 = 30266
Step 75: 30266 + 409 = 30675
Step 76: 30675 + 409 = 31084
Step 77: 31084 + 409 = 31493
Step 78: 31493 + 409 = 31902
Step 79: 31902 + 409 = 32311
Step 80: 32311 + 409 = 32720
Step 81: 32720 + 409 = 33129
Step 82: 33129 + 409 = 33538
Step 83: 33538 + 409 = 33947
Step 84: 33947 + 409 = 34356
Step 85: 34356 + 409 = 34765
Step 86: 34765 + 409 = 35174
Step 87: 35174 + 409 = 35583
Step 88: 35583 + 409 = 35992
Step 89: 35992 + 409 = 36401
Step 90: 36401 + 409 = 36810
Step 91: 36810 + 409 = 37219
Step 92: 37219 + 409 = 37628
Step 93: 37628 + 409 = 38037
Step 94: 38037 + 409 = 38446
Step 95: 38446 + 409 = 38855
Step 96: 38855 + 409 = 39264
Step 97: 39264 + 409 = 39673
Step 98: 39673 + 409 = 40082
Step 99: 40082 + 409 = 40491
Step 100: 40491 + 409 = 40900
Step 101: 40900 + 409 = 41309
Step 102: 41309 + 409 = 41718
Step 103: 41718 + 409 = 42127
Step 104: 42127 + 409 = 42536
Step 105: 42536 + 409 = 42945
Step 106: 42945 + 409 = 43354
Step 107: 43354 + 409 = 43763
Step 108: 43763 + 409 = 44172
Step 109: 44172 + 409 = 44581
Step 110: 44581 + 409 = 44990
Step 111: 44990 + 409 = 45399
Step 112: 45399 + 409 = 45808
Step 113: 45808 + 409 = 46217
Step 114: 46217 + 409 = 46626
Step 115: 46626 + 409 = 47035
Step 116: 47035 + 409 = 47444
Step 117: 47444 + 409 = 47853
Step 118: 47853 + 409 = 48262
Step 119: 48262 + 409 = 48671
Step 120: 48671 + 409 = 49080
Step 121: 49080 + 409 = 49489
Step 122: 49489 + 409 = 49898
Step 123: 49898 + 409 = 50307
Step 124: 50307 + 409 = 50716
Step 125: 50716 + 409 = 51125
Step 126: 51125 + 409 = 51534
Step 127: 51534 + 409 = 51943
Step 128: 51943 + 409 = 52352
Step 129: 52352 + 409 = 52761
Step 130: 52761 + 409 = 53170
Step 131: 53170 + 409 = 53579
Step 132: 53579 + 409 = 53988
Step 133: 53988 + 409 = 54397
Step 134: 54397 + 409 = 54806
Step 135: 54806 + 409 = 55215
Step 136: 55215 + 409 = 55624
Step 137: 55624 + 409 = 56033
Step 138: 56033 + 409 = 56442
Step 139: 56442 + 409 = 56851
Step 140: 56851 + 409 = 57260
Step 141: 57260 + 409 = 57669
Step 142: 57669 + 409 = 58078
Step 143: 58078 + 409 = 58487
Step 144: 58487 + 409 = 58896
Step 145: 58896 + 409 = 59305
Step 146: 59305 + 409 = 59714
Step 147: 59714 + 409 = 60123
Step 148: 60123 + 409 = 60532
Step 149: 60532 + 409 = 60941
Step 150: 60941 + 409 = 61350
Step 151: 61350 + 409 = 61759
Step 152: 61759 + 409 = 62168
Step 153: 62168 + 409 = 62577
Step 154: 62577 + 409 = 62986
Step 155: 62986 + 409 = 63395
Step 156: 63395 + 409 = 63804
Step 157: 63804 + 409 = 64213
Step 158: 64213 + 409 = 64622
Step 159: 64622 + 409 = 65031
Step 160: 65031 + 409 = 65440
Step 161: 65440 + 409 = 65849
Step 162: 65849 + 409 = 66258
Step 163: 66258 + 409 = 66667
Step 164: 66667 + 409 = 67076
Step 165: 67076 + 409 = 67485
Step 166: 67485 + 409 = 67894
Step 167: 67894 + 409 = 68303
Step 168: 68303 + 409 = 68712
Step 169: 68712 + 409 = 69121
Step 170: 69121 + 409 = 69530
Step 171: 69530 + 409 = 69939
Step 172: 69939 + 409 = 70348
Step 173: 70348 + 409 = 70757
Step 174: 70757 + 409 = 71166
Step 175: 71166 + 409 = 71575
Step 176: 71575 + 409 = 71984
Step 177: 71984 + 409 = 72393
Step 178: 72393 + 409 = 72802
Step 179: 72802 + 409 = 73211
Step 180: 73211 + 409 = 73620
Step 181: 73620 + 409 = 74029
Step 182: 74029 + 409 = 74438
Step 183: 74438 + 409 = 74847
Step 184: 74847 + 409 = 75256
Step 185: 75256 + 409 = 75665
Step 186: 75665 + 409 = 76074
Step 187: 76074 + 409 = 76483
Step 188: 76483 + 409 = 76892
Step 189: 76892 + 409 = 77301
Step 190: 77301 + 409 = 77710
Step 191: 77710 + 409 = 78119
Step 192: 78119 + 409 = 78528
Step 193: 78528 + 409 = 78937
Step 194: 78937 + 409 = 79346
Step 195: 79346 + 409 = 79755
Step 196: 79755 + 409 = 80164
Step 197: 80164 + 409 = 80573
Step 198: 80573 + 409 = 80982
Step 199: 80982 + 409 = 81391
Step 200: 81391 + 409 = 81800
Step 201: 81800 + 409 = 82209
Step 202: 82209 + 409 = 82618
Step 203: 82618 + 409 = 83027
Step 204: 83027 + 409 = 83436
Step 205: 83436 + 409 = 83845
Step 206: 83845 + 409 = 84254
Step 207: 84254 + 409 = 84663
Step 208: 84663 + 409 = 85072
Step 209: 85072 + 409 = 85481
Step 210: 85481 + 409 = 85890
Step 211: 85890 + 409 = 86299
Step 212: 86299 + 409 = 86708
Step 213: 86708 + 409 = 87117
Step 214: 87117 + 409 = 87526
Step 215: 87526 + 409 = 87935
Step 216: 87935 + 409 = 88344
Step 217: 88344 + 409 = 88753
Step 218: 88753 + 409 = 89162
Step 219: 89162 + 409 = 89571
Step 220: 89571 + 409 = 89980
Step 221: 89980 + 409 = 90389
Step 222: 90389 + 409 = 90798
Step 223: 90798 + 409 = 91207
Step 224: 91207 + 409 = 91616
Step 225: 91616 + 409 = 92025
Step 226: 92025 + 409 = 92434
Step 227: 92434 + 409 = 92843
Step 228: 92843 + 409 = 93252
Step 229: 93252 + 409 = 93661
Step 230: 93661 + 409 = 94070
Step 231: 94070 + 409 = 94479
Step 232: 94479 + 409 = 94888
Step 233: 94888 + 409 = 95297
Step 234: 95297 + 409 = 95706
Step 235: 95706 + 409 = 96115
Step 236: 96115 + 409 = 96524
Step 237: 96524 + 409 = 96933
Step 238: 96933 + 409 = 97342
Step 239: 97342 + 409 = 97751
Step 240: 97751 + 409 = 98160
Step 241: 98160 + 409 = 98569
Step 242: 98569 + 409 = 98978
Step 243: 98978 + 409 = 99387
Step 244: 99387 + 409 = 99796
Step 245: 99796 + 409 = 100205
Step 246: 100205 + 409 = 100614
Step 247: 100614 + 409 = 101023
Step 248: 101023 + 409 = 101432
Step 249: 101432 + 409 = 101841
Step 250: 101841 + 409 = 102250
Step 251: 102250 + 409 = 102659
Step 252: 102659 + 409 = 103068
Step 253: 103068 + 409 = 103477
Step 254: 103477 + 409 = 103886
Step 255: 103886 + 409 = 104295
Step 256: 104295 + 409 = 104704
Step 257: 104704 + 409 = 105113
Step 258: 105113 + 409 = 105522
Step 259: 105522 + 409 = 105931
Step 260: 105931 + 409 = 106340
Step 261: 106340 + 409 = 106749
Step 262: 106749 + 409 = 107158
Step 263: 107158 + 409 = 107567
Step 264: 107567 + 409 = 107976
Step 265: 107976 + 409 = 108385
Step 266: 108385 + 409 = 108794
Step 267: 108794 + 409 = 109203
Step 268: 109203 + 409 = 109612
Step 269: 109612 + 409 = 110021
Step 270: 110021 + 409 = 110430
Step 271: 110430 + 409 = 110839
Step 272: 110839 + 409 = 111248
Step 273: 111248 + 409 = 111657
Step 274: 111657 + 409 = 112066
Step 275: 112066 + 409 = 112475
Step 276: 112475 + 409 = 112884
Step 277: 112884 + 409 = 113293
Step 278: 113293 + 409 = 113702
Step 279: 113702 + 409 = 114111
Step 280: 114111 + 409 = 114520
Step 281: 114520 + 409 = 114929
Step 282: 114929 + 409 = 115338

So, 409*282 = 115338