Let's get this math done. We have 729 and we're going to multiply it by 298. This is the same as taking 729 and adding it to itself 298 times.
Step 1: 0 + 729 = 729
Step 2: 729 + 729 = 1458
Step 3: 1458 + 729 = 2187
Step 4: 2187 + 729 = 2916
Step 5: 2916 + 729 = 3645
Step 6: 3645 + 729 = 4374
Step 7: 4374 + 729 = 5103
Step 8: 5103 + 729 = 5832
Step 9: 5832 + 729 = 6561
Step 10: 6561 + 729 = 7290
Step 11: 7290 + 729 = 8019
Step 12: 8019 + 729 = 8748
Step 13: 8748 + 729 = 9477
Step 14: 9477 + 729 = 10206
Step 15: 10206 + 729 = 10935
Step 16: 10935 + 729 = 11664
Step 17: 11664 + 729 = 12393
Step 18: 12393 + 729 = 13122
Step 19: 13122 + 729 = 13851
Step 20: 13851 + 729 = 14580
Step 21: 14580 + 729 = 15309
Step 22: 15309 + 729 = 16038
Step 23: 16038 + 729 = 16767
Step 24: 16767 + 729 = 17496
Step 25: 17496 + 729 = 18225
Step 26: 18225 + 729 = 18954
Step 27: 18954 + 729 = 19683
Step 28: 19683 + 729 = 20412
Step 29: 20412 + 729 = 21141
Step 30: 21141 + 729 = 21870
Step 31: 21870 + 729 = 22599
Step 32: 22599 + 729 = 23328
Step 33: 23328 + 729 = 24057
Step 34: 24057 + 729 = 24786
Step 35: 24786 + 729 = 25515
Step 36: 25515 + 729 = 26244
Step 37: 26244 + 729 = 26973
Step 38: 26973 + 729 = 27702
Step 39: 27702 + 729 = 28431
Step 40: 28431 + 729 = 29160
Step 41: 29160 + 729 = 29889
Step 42: 29889 + 729 = 30618
Step 43: 30618 + 729 = 31347
Step 44: 31347 + 729 = 32076
Step 45: 32076 + 729 = 32805
Step 46: 32805 + 729 = 33534
Step 47: 33534 + 729 = 34263
Step 48: 34263 + 729 = 34992
Step 49: 34992 + 729 = 35721
Step 50: 35721 + 729 = 36450
Step 51: 36450 + 729 = 37179
Step 52: 37179 + 729 = 37908
Step 53: 37908 + 729 = 38637
Step 54: 38637 + 729 = 39366
Step 55: 39366 + 729 = 40095
Step 56: 40095 + 729 = 40824
Step 57: 40824 + 729 = 41553
Step 58: 41553 + 729 = 42282
Step 59: 42282 + 729 = 43011
Step 60: 43011 + 729 = 43740
Step 61: 43740 + 729 = 44469
Step 62: 44469 + 729 = 45198
Step 63: 45198 + 729 = 45927
Step 64: 45927 + 729 = 46656
Step 65: 46656 + 729 = 47385
Step 66: 47385 + 729 = 48114
Step 67: 48114 + 729 = 48843
Step 68: 48843 + 729 = 49572
Step 69: 49572 + 729 = 50301
Step 70: 50301 + 729 = 51030
Step 71: 51030 + 729 = 51759
Step 72: 51759 + 729 = 52488
Step 73: 52488 + 729 = 53217
Step 74: 53217 + 729 = 53946
Step 75: 53946 + 729 = 54675
Step 76: 54675 + 729 = 55404
Step 77: 55404 + 729 = 56133
Step 78: 56133 + 729 = 56862
Step 79: 56862 + 729 = 57591
Step 80: 57591 + 729 = 58320
Step 81: 58320 + 729 = 59049
Step 82: 59049 + 729 = 59778
Step 83: 59778 + 729 = 60507
Step 84: 60507 + 729 = 61236
Step 85: 61236 + 729 = 61965
Step 86: 61965 + 729 = 62694
Step 87: 62694 + 729 = 63423
Step 88: 63423 + 729 = 64152
Step 89: 64152 + 729 = 64881
Step 90: 64881 + 729 = 65610
Step 91: 65610 + 729 = 66339
Step 92: 66339 + 729 = 67068
Step 93: 67068 + 729 = 67797
Step 94: 67797 + 729 = 68526
Step 95: 68526 + 729 = 69255
Step 96: 69255 + 729 = 69984
Step 97: 69984 + 729 = 70713
Step 98: 70713 + 729 = 71442
Step 99: 71442 + 729 = 72171
Step 100: 72171 + 729 = 72900
Step 101: 72900 + 729 = 73629
Step 102: 73629 + 729 = 74358
Step 103: 74358 + 729 = 75087
Step 104: 75087 + 729 = 75816
Step 105: 75816 + 729 = 76545
Step 106: 76545 + 729 = 77274
Step 107: 77274 + 729 = 78003
Step 108: 78003 + 729 = 78732
Step 109: 78732 + 729 = 79461
Step 110: 79461 + 729 = 80190
Step 111: 80190 + 729 = 80919
Step 112: 80919 + 729 = 81648
Step 113: 81648 + 729 = 82377
Step 114: 82377 + 729 = 83106
Step 115: 83106 + 729 = 83835
Step 116: 83835 + 729 = 84564
Step 117: 84564 + 729 = 85293
Step 118: 85293 + 729 = 86022
Step 119: 86022 + 729 = 86751
Step 120: 86751 + 729 = 87480
Step 121: 87480 + 729 = 88209
Step 122: 88209 + 729 = 88938
Step 123: 88938 + 729 = 89667
Step 124: 89667 + 729 = 90396
Step 125: 90396 + 729 = 91125
Step 126: 91125 + 729 = 91854
Step 127: 91854 + 729 = 92583
Step 128: 92583 + 729 = 93312
Step 129: 93312 + 729 = 94041
Step 130: 94041 + 729 = 94770
Step 131: 94770 + 729 = 95499
Step 132: 95499 + 729 = 96228
Step 133: 96228 + 729 = 96957
Step 134: 96957 + 729 = 97686
Step 135: 97686 + 729 = 98415
Step 136: 98415 + 729 = 99144
Step 137: 99144 + 729 = 99873
Step 138: 99873 + 729 = 100602
Step 139: 100602 + 729 = 101331
Step 140: 101331 + 729 = 102060
Step 141: 102060 + 729 = 102789
Step 142: 102789 + 729 = 103518
Step 143: 103518 + 729 = 104247
Step 144: 104247 + 729 = 104976
Step 145: 104976 + 729 = 105705
Step 146: 105705 + 729 = 106434
Step 147: 106434 + 729 = 107163
Step 148: 107163 + 729 = 107892
Step 149: 107892 + 729 = 108621
Step 150: 108621 + 729 = 109350
Step 151: 109350 + 729 = 110079
Step 152: 110079 + 729 = 110808
Step 153: 110808 + 729 = 111537
Step 154: 111537 + 729 = 112266
Step 155: 112266 + 729 = 112995
Step 156: 112995 + 729 = 113724
Step 157: 113724 + 729 = 114453
Step 158: 114453 + 729 = 115182
Step 159: 115182 + 729 = 115911
Step 160: 115911 + 729 = 116640
Step 161: 116640 + 729 = 117369
Step 162: 117369 + 729 = 118098
Step 163: 118098 + 729 = 118827
Step 164: 118827 + 729 = 119556
Step 165: 119556 + 729 = 120285
Step 166: 120285 + 729 = 121014
Step 167: 121014 + 729 = 121743
Step 168: 121743 + 729 = 122472
Step 169: 122472 + 729 = 123201
Step 170: 123201 + 729 = 123930
Step 171: 123930 + 729 = 124659
Step 172: 124659 + 729 = 125388
Step 173: 125388 + 729 = 126117
Step 174: 126117 + 729 = 126846
Step 175: 126846 + 729 = 127575
Step 176: 127575 + 729 = 128304
Step 177: 128304 + 729 = 129033
Step 178: 129033 + 729 = 129762
Step 179: 129762 + 729 = 130491
Step 180: 130491 + 729 = 131220
Step 181: 131220 + 729 = 131949
Step 182: 131949 + 729 = 132678
Step 183: 132678 + 729 = 133407
Step 184: 133407 + 729 = 134136
Step 185: 134136 + 729 = 134865
Step 186: 134865 + 729 = 135594
Step 187: 135594 + 729 = 136323
Step 188: 136323 + 729 = 137052
Step 189: 137052 + 729 = 137781
Step 190: 137781 + 729 = 138510
Step 191: 138510 + 729 = 139239
Step 192: 139239 + 729 = 139968
Step 193: 139968 + 729 = 140697
Step 194: 140697 + 729 = 141426
Step 195: 141426 + 729 = 142155
Step 196: 142155 + 729 = 142884
Step 197: 142884 + 729 = 143613
Step 198: 143613 + 729 = 144342
Step 199: 144342 + 729 = 145071
Step 200: 145071 + 729 = 145800
Step 201: 145800 + 729 = 146529
Step 202: 146529 + 729 = 147258
Step 203: 147258 + 729 = 147987
Step 204: 147987 + 729 = 148716
Step 205: 148716 + 729 = 149445
Step 206: 149445 + 729 = 150174
Step 207: 150174 + 729 = 150903
Step 208: 150903 + 729 = 151632
Step 209: 151632 + 729 = 152361
Step 210: 152361 + 729 = 153090
Step 211: 153090 + 729 = 153819
Step 212: 153819 + 729 = 154548
Step 213: 154548 + 729 = 155277
Step 214: 155277 + 729 = 156006
Step 215: 156006 + 729 = 156735
Step 216: 156735 + 729 = 157464
Step 217: 157464 + 729 = 158193
Step 218: 158193 + 729 = 158922
Step 219: 158922 + 729 = 159651
Step 220: 159651 + 729 = 160380
Step 221: 160380 + 729 = 161109
Step 222: 161109 + 729 = 161838
Step 223: 161838 + 729 = 162567
Step 224: 162567 + 729 = 163296
Step 225: 163296 + 729 = 164025
Step 226: 164025 + 729 = 164754
Step 227: 164754 + 729 = 165483
Step 228: 165483 + 729 = 166212
Step 229: 166212 + 729 = 166941
Step 230: 166941 + 729 = 167670
Step 231: 167670 + 729 = 168399
Step 232: 168399 + 729 = 169128
Step 233: 169128 + 729 = 169857
Step 234: 169857 + 729 = 170586
Step 235: 170586 + 729 = 171315
Step 236: 171315 + 729 = 172044
Step 237: 172044 + 729 = 172773
Step 238: 172773 + 729 = 173502
Step 239: 173502 + 729 = 174231
Step 240: 174231 + 729 = 174960
Step 241: 174960 + 729 = 175689
Step 242: 175689 + 729 = 176418
Step 243: 176418 + 729 = 177147
Step 244: 177147 + 729 = 177876
Step 245: 177876 + 729 = 178605
Step 246: 178605 + 729 = 179334
Step 247: 179334 + 729 = 180063
Step 248: 180063 + 729 = 180792
Step 249: 180792 + 729 = 181521
Step 250: 181521 + 729 = 182250
Step 251: 182250 + 729 = 182979
Step 252: 182979 + 729 = 183708
Step 253: 183708 + 729 = 184437
Step 254: 184437 + 729 = 185166
Step 255: 185166 + 729 = 185895
Step 256: 185895 + 729 = 186624
Step 257: 186624 + 729 = 187353
Step 258: 187353 + 729 = 188082
Step 259: 188082 + 729 = 188811
Step 260: 188811 + 729 = 189540
Step 261: 189540 + 729 = 190269
Step 262: 190269 + 729 = 190998
Step 263: 190998 + 729 = 191727
Step 264: 191727 + 729 = 192456
Step 265: 192456 + 729 = 193185
Step 266: 193185 + 729 = 193914
Step 267: 193914 + 729 = 194643
Step 268: 194643 + 729 = 195372
Step 269: 195372 + 729 = 196101
Step 270: 196101 + 729 = 196830
Step 271: 196830 + 729 = 197559
Step 272: 197559 + 729 = 198288
Step 273: 198288 + 729 = 199017
Step 274: 199017 + 729 = 199746
Step 275: 199746 + 729 = 200475
Step 276: 200475 + 729 = 201204
Step 277: 201204 + 729 = 201933
Step 278: 201933 + 729 = 202662
Step 279: 202662 + 729 = 203391
Step 280: 203391 + 729 = 204120
Step 281: 204120 + 729 = 204849
Step 282: 204849 + 729 = 205578
Step 283: 205578 + 729 = 206307
Step 284: 206307 + 729 = 207036
Step 285: 207036 + 729 = 207765
Step 286: 207765 + 729 = 208494
Step 287: 208494 + 729 = 209223
Step 288: 209223 + 729 = 209952
Step 289: 209952 + 729 = 210681
Step 290: 210681 + 729 = 211410
Step 291: 211410 + 729 = 212139
Step 292: 212139 + 729 = 212868
Step 293: 212868 + 729 = 213597
Step 294: 213597 + 729 = 214326
Step 295: 214326 + 729 = 215055
Step 296: 215055 + 729 = 215784
Step 297: 215784 + 729 = 216513
Step 298: 216513 + 729 = 217242

So, 729*298 = 217242