OK, let's work through this together. We're starting with 829 and we're going to multiply it by 225, which means we add 829 to itself 225 times.
Step 1: 0 + 829 = 829
Step 2: 829 + 829 = 1658
Step 3: 1658 + 829 = 2487
Step 4: 2487 + 829 = 3316
Step 5: 3316 + 829 = 4145
Step 6: 4145 + 829 = 4974
Step 7: 4974 + 829 = 5803
Step 8: 5803 + 829 = 6632
Step 9: 6632 + 829 = 7461
Step 10: 7461 + 829 = 8290
Step 11: 8290 + 829 = 9119
Step 12: 9119 + 829 = 9948
Step 13: 9948 + 829 = 10777
Step 14: 10777 + 829 = 11606
Step 15: 11606 + 829 = 12435
Step 16: 12435 + 829 = 13264
Step 17: 13264 + 829 = 14093
Step 18: 14093 + 829 = 14922
Step 19: 14922 + 829 = 15751
Step 20: 15751 + 829 = 16580
Step 21: 16580 + 829 = 17409
Step 22: 17409 + 829 = 18238
Step 23: 18238 + 829 = 19067
Step 24: 19067 + 829 = 19896
Step 25: 19896 + 829 = 20725
Step 26: 20725 + 829 = 21554
Step 27: 21554 + 829 = 22383
Step 28: 22383 + 829 = 23212
Step 29: 23212 + 829 = 24041
Step 30: 24041 + 829 = 24870
Step 31: 24870 + 829 = 25699
Step 32: 25699 + 829 = 26528
Step 33: 26528 + 829 = 27357
Step 34: 27357 + 829 = 28186
Step 35: 28186 + 829 = 29015
Step 36: 29015 + 829 = 29844
Step 37: 29844 + 829 = 30673
Step 38: 30673 + 829 = 31502
Step 39: 31502 + 829 = 32331
Step 40: 32331 + 829 = 33160
Step 41: 33160 + 829 = 33989
Step 42: 33989 + 829 = 34818
Step 43: 34818 + 829 = 35647
Step 44: 35647 + 829 = 36476
Step 45: 36476 + 829 = 37305
Step 46: 37305 + 829 = 38134
Step 47: 38134 + 829 = 38963
Step 48: 38963 + 829 = 39792
Step 49: 39792 + 829 = 40621
Step 50: 40621 + 829 = 41450
Step 51: 41450 + 829 = 42279
Step 52: 42279 + 829 = 43108
Step 53: 43108 + 829 = 43937
Step 54: 43937 + 829 = 44766
Step 55: 44766 + 829 = 45595
Step 56: 45595 + 829 = 46424
Step 57: 46424 + 829 = 47253
Step 58: 47253 + 829 = 48082
Step 59: 48082 + 829 = 48911
Step 60: 48911 + 829 = 49740
Step 61: 49740 + 829 = 50569
Step 62: 50569 + 829 = 51398
Step 63: 51398 + 829 = 52227
Step 64: 52227 + 829 = 53056
Step 65: 53056 + 829 = 53885
Step 66: 53885 + 829 = 54714
Step 67: 54714 + 829 = 55543
Step 68: 55543 + 829 = 56372
Step 69: 56372 + 829 = 57201
Step 70: 57201 + 829 = 58030
Step 71: 58030 + 829 = 58859
Step 72: 58859 + 829 = 59688
Step 73: 59688 + 829 = 60517
Step 74: 60517 + 829 = 61346
Step 75: 61346 + 829 = 62175
Step 76: 62175 + 829 = 63004
Step 77: 63004 + 829 = 63833
Step 78: 63833 + 829 = 64662
Step 79: 64662 + 829 = 65491
Step 80: 65491 + 829 = 66320
Step 81: 66320 + 829 = 67149
Step 82: 67149 + 829 = 67978
Step 83: 67978 + 829 = 68807
Step 84: 68807 + 829 = 69636
Step 85: 69636 + 829 = 70465
Step 86: 70465 + 829 = 71294
Step 87: 71294 + 829 = 72123
Step 88: 72123 + 829 = 72952
Step 89: 72952 + 829 = 73781
Step 90: 73781 + 829 = 74610
Step 91: 74610 + 829 = 75439
Step 92: 75439 + 829 = 76268
Step 93: 76268 + 829 = 77097
Step 94: 77097 + 829 = 77926
Step 95: 77926 + 829 = 78755
Step 96: 78755 + 829 = 79584
Step 97: 79584 + 829 = 80413
Step 98: 80413 + 829 = 81242
Step 99: 81242 + 829 = 82071
Step 100: 82071 + 829 = 82900
Step 101: 82900 + 829 = 83729
Step 102: 83729 + 829 = 84558
Step 103: 84558 + 829 = 85387
Step 104: 85387 + 829 = 86216
Step 105: 86216 + 829 = 87045
Step 106: 87045 + 829 = 87874
Step 107: 87874 + 829 = 88703
Step 108: 88703 + 829 = 89532
Step 109: 89532 + 829 = 90361
Step 110: 90361 + 829 = 91190
Step 111: 91190 + 829 = 92019
Step 112: 92019 + 829 = 92848
Step 113: 92848 + 829 = 93677
Step 114: 93677 + 829 = 94506
Step 115: 94506 + 829 = 95335
Step 116: 95335 + 829 = 96164
Step 117: 96164 + 829 = 96993
Step 118: 96993 + 829 = 97822
Step 119: 97822 + 829 = 98651
Step 120: 98651 + 829 = 99480
Step 121: 99480 + 829 = 100309
Step 122: 100309 + 829 = 101138
Step 123: 101138 + 829 = 101967
Step 124: 101967 + 829 = 102796
Step 125: 102796 + 829 = 103625
Step 126: 103625 + 829 = 104454
Step 127: 104454 + 829 = 105283
Step 128: 105283 + 829 = 106112
Step 129: 106112 + 829 = 106941
Step 130: 106941 + 829 = 107770
Step 131: 107770 + 829 = 108599
Step 132: 108599 + 829 = 109428
Step 133: 109428 + 829 = 110257
Step 134: 110257 + 829 = 111086
Step 135: 111086 + 829 = 111915
Step 136: 111915 + 829 = 112744
Step 137: 112744 + 829 = 113573
Step 138: 113573 + 829 = 114402
Step 139: 114402 + 829 = 115231
Step 140: 115231 + 829 = 116060
Step 141: 116060 + 829 = 116889
Step 142: 116889 + 829 = 117718
Step 143: 117718 + 829 = 118547
Step 144: 118547 + 829 = 119376
Step 145: 119376 + 829 = 120205
Step 146: 120205 + 829 = 121034
Step 147: 121034 + 829 = 121863
Step 148: 121863 + 829 = 122692
Step 149: 122692 + 829 = 123521
Step 150: 123521 + 829 = 124350
Step 151: 124350 + 829 = 125179
Step 152: 125179 + 829 = 126008
Step 153: 126008 + 829 = 126837
Step 154: 126837 + 829 = 127666
Step 155: 127666 + 829 = 128495
Step 156: 128495 + 829 = 129324
Step 157: 129324 + 829 = 130153
Step 158: 130153 + 829 = 130982
Step 159: 130982 + 829 = 131811
Step 160: 131811 + 829 = 132640
Step 161: 132640 + 829 = 133469
Step 162: 133469 + 829 = 134298
Step 163: 134298 + 829 = 135127
Step 164: 135127 + 829 = 135956
Step 165: 135956 + 829 = 136785
Step 166: 136785 + 829 = 137614
Step 167: 137614 + 829 = 138443
Step 168: 138443 + 829 = 139272
Step 169: 139272 + 829 = 140101
Step 170: 140101 + 829 = 140930
Step 171: 140930 + 829 = 141759
Step 172: 141759 + 829 = 142588
Step 173: 142588 + 829 = 143417
Step 174: 143417 + 829 = 144246
Step 175: 144246 + 829 = 145075
Step 176: 145075 + 829 = 145904
Step 177: 145904 + 829 = 146733
Step 178: 146733 + 829 = 147562
Step 179: 147562 + 829 = 148391
Step 180: 148391 + 829 = 149220
Step 181: 149220 + 829 = 150049
Step 182: 150049 + 829 = 150878
Step 183: 150878 + 829 = 151707
Step 184: 151707 + 829 = 152536
Step 185: 152536 + 829 = 153365
Step 186: 153365 + 829 = 154194
Step 187: 154194 + 829 = 155023
Step 188: 155023 + 829 = 155852
Step 189: 155852 + 829 = 156681
Step 190: 156681 + 829 = 157510
Step 191: 157510 + 829 = 158339
Step 192: 158339 + 829 = 159168
Step 193: 159168 + 829 = 159997
Step 194: 159997 + 829 = 160826
Step 195: 160826 + 829 = 161655
Step 196: 161655 + 829 = 162484
Step 197: 162484 + 829 = 163313
Step 198: 163313 + 829 = 164142
Step 199: 164142 + 829 = 164971
Step 200: 164971 + 829 = 165800
Step 201: 165800 + 829 = 166629
Step 202: 166629 + 829 = 167458
Step 203: 167458 + 829 = 168287
Step 204: 168287 + 829 = 169116
Step 205: 169116 + 829 = 169945
Step 206: 169945 + 829 = 170774
Step 207: 170774 + 829 = 171603
Step 208: 171603 + 829 = 172432
Step 209: 172432 + 829 = 173261
Step 210: 173261 + 829 = 174090
Step 211: 174090 + 829 = 174919
Step 212: 174919 + 829 = 175748
Step 213: 175748 + 829 = 176577
Step 214: 176577 + 829 = 177406
Step 215: 177406 + 829 = 178235
Step 216: 178235 + 829 = 179064
Step 217: 179064 + 829 = 179893
Step 218: 179893 + 829 = 180722
Step 219: 180722 + 829 = 181551
Step 220: 181551 + 829 = 182380
Step 221: 182380 + 829 = 183209
Step 222: 183209 + 829 = 184038
Step 223: 184038 + 829 = 184867
Step 224: 184867 + 829 = 185696
Step 225: 185696 + 829 = 186525

So, 829*225 = 186525