Alright, let's solve this math problem step by step. First, we have the number 243. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 291. So, we're going to take the number 243 and add it to itself 291 times.
Step 1: 0 + 243 = 243
Step 2: 243 + 243 = 486
Step 3: 486 + 243 = 729
Step 4: 729 + 243 = 972
Step 5: 972 + 243 = 1215
Step 6: 1215 + 243 = 1458
Step 7: 1458 + 243 = 1701
Step 8: 1701 + 243 = 1944
Step 9: 1944 + 243 = 2187
Step 10: 2187 + 243 = 2430
Step 11: 2430 + 243 = 2673
Step 12: 2673 + 243 = 2916
Step 13: 2916 + 243 = 3159
Step 14: 3159 + 243 = 3402
Step 15: 3402 + 243 = 3645
Step 16: 3645 + 243 = 3888
Step 17: 3888 + 243 = 4131
Step 18: 4131 + 243 = 4374
Step 19: 4374 + 243 = 4617
Step 20: 4617 + 243 = 4860
Step 21: 4860 + 243 = 5103
Step 22: 5103 + 243 = 5346
Step 23: 5346 + 243 = 5589
Step 24: 5589 + 243 = 5832
Step 25: 5832 + 243 = 6075
Step 26: 6075 + 243 = 6318
Step 27: 6318 + 243 = 6561
Step 28: 6561 + 243 = 6804
Step 29: 6804 + 243 = 7047
Step 30: 7047 + 243 = 7290
Step 31: 7290 + 243 = 7533
Step 32: 7533 + 243 = 7776
Step 33: 7776 + 243 = 8019
Step 34: 8019 + 243 = 8262
Step 35: 8262 + 243 = 8505
Step 36: 8505 + 243 = 8748
Step 37: 8748 + 243 = 8991
Step 38: 8991 + 243 = 9234
Step 39: 9234 + 243 = 9477
Step 40: 9477 + 243 = 9720
Step 41: 9720 + 243 = 9963
Step 42: 9963 + 243 = 10206
Step 43: 10206 + 243 = 10449
Step 44: 10449 + 243 = 10692
Step 45: 10692 + 243 = 10935
Step 46: 10935 + 243 = 11178
Step 47: 11178 + 243 = 11421
Step 48: 11421 + 243 = 11664
Step 49: 11664 + 243 = 11907
Step 50: 11907 + 243 = 12150
Step 51: 12150 + 243 = 12393
Step 52: 12393 + 243 = 12636
Step 53: 12636 + 243 = 12879
Step 54: 12879 + 243 = 13122
Step 55: 13122 + 243 = 13365
Step 56: 13365 + 243 = 13608
Step 57: 13608 + 243 = 13851
Step 58: 13851 + 243 = 14094
Step 59: 14094 + 243 = 14337
Step 60: 14337 + 243 = 14580
Step 61: 14580 + 243 = 14823
Step 62: 14823 + 243 = 15066
Step 63: 15066 + 243 = 15309
Step 64: 15309 + 243 = 15552
Step 65: 15552 + 243 = 15795
Step 66: 15795 + 243 = 16038
Step 67: 16038 + 243 = 16281
Step 68: 16281 + 243 = 16524
Step 69: 16524 + 243 = 16767
Step 70: 16767 + 243 = 17010
Step 71: 17010 + 243 = 17253
Step 72: 17253 + 243 = 17496
Step 73: 17496 + 243 = 17739
Step 74: 17739 + 243 = 17982
Step 75: 17982 + 243 = 18225
Step 76: 18225 + 243 = 18468
Step 77: 18468 + 243 = 18711
Step 78: 18711 + 243 = 18954
Step 79: 18954 + 243 = 19197
Step 80: 19197 + 243 = 19440
Step 81: 19440 + 243 = 19683
Step 82: 19683 + 243 = 19926
Step 83: 19926 + 243 = 20169
Step 84: 20169 + 243 = 20412
Step 85: 20412 + 243 = 20655
Step 86: 20655 + 243 = 20898
Step 87: 20898 + 243 = 21141
Step 88: 21141 + 243 = 21384
Step 89: 21384 + 243 = 21627
Step 90: 21627 + 243 = 21870
Step 91: 21870 + 243 = 22113
Step 92: 22113 + 243 = 22356
Step 93: 22356 + 243 = 22599
Step 94: 22599 + 243 = 22842
Step 95: 22842 + 243 = 23085
Step 96: 23085 + 243 = 23328
Step 97: 23328 + 243 = 23571
Step 98: 23571 + 243 = 23814
Step 99: 23814 + 243 = 24057
Step 100: 24057 + 243 = 24300
Step 101: 24300 + 243 = 24543
Step 102: 24543 + 243 = 24786
Step 103: 24786 + 243 = 25029
Step 104: 25029 + 243 = 25272
Step 105: 25272 + 243 = 25515
Step 106: 25515 + 243 = 25758
Step 107: 25758 + 243 = 26001
Step 108: 26001 + 243 = 26244
Step 109: 26244 + 243 = 26487
Step 110: 26487 + 243 = 26730
Step 111: 26730 + 243 = 26973
Step 112: 26973 + 243 = 27216
Step 113: 27216 + 243 = 27459
Step 114: 27459 + 243 = 27702
Step 115: 27702 + 243 = 27945
Step 116: 27945 + 243 = 28188
Step 117: 28188 + 243 = 28431
Step 118: 28431 + 243 = 28674
Step 119: 28674 + 243 = 28917
Step 120: 28917 + 243 = 29160
Step 121: 29160 + 243 = 29403
Step 122: 29403 + 243 = 29646
Step 123: 29646 + 243 = 29889
Step 124: 29889 + 243 = 30132
Step 125: 30132 + 243 = 30375
Step 126: 30375 + 243 = 30618
Step 127: 30618 + 243 = 30861
Step 128: 30861 + 243 = 31104
Step 129: 31104 + 243 = 31347
Step 130: 31347 + 243 = 31590
Step 131: 31590 + 243 = 31833
Step 132: 31833 + 243 = 32076
Step 133: 32076 + 243 = 32319
Step 134: 32319 + 243 = 32562
Step 135: 32562 + 243 = 32805
Step 136: 32805 + 243 = 33048
Step 137: 33048 + 243 = 33291
Step 138: 33291 + 243 = 33534
Step 139: 33534 + 243 = 33777
Step 140: 33777 + 243 = 34020
Step 141: 34020 + 243 = 34263
Step 142: 34263 + 243 = 34506
Step 143: 34506 + 243 = 34749
Step 144: 34749 + 243 = 34992
Step 145: 34992 + 243 = 35235
Step 146: 35235 + 243 = 35478
Step 147: 35478 + 243 = 35721
Step 148: 35721 + 243 = 35964
Step 149: 35964 + 243 = 36207
Step 150: 36207 + 243 = 36450
Step 151: 36450 + 243 = 36693
Step 152: 36693 + 243 = 36936
Step 153: 36936 + 243 = 37179
Step 154: 37179 + 243 = 37422
Step 155: 37422 + 243 = 37665
Step 156: 37665 + 243 = 37908
Step 157: 37908 + 243 = 38151
Step 158: 38151 + 243 = 38394
Step 159: 38394 + 243 = 38637
Step 160: 38637 + 243 = 38880
Step 161: 38880 + 243 = 39123
Step 162: 39123 + 243 = 39366
Step 163: 39366 + 243 = 39609
Step 164: 39609 + 243 = 39852
Step 165: 39852 + 243 = 40095
Step 166: 40095 + 243 = 40338
Step 167: 40338 + 243 = 40581
Step 168: 40581 + 243 = 40824
Step 169: 40824 + 243 = 41067
Step 170: 41067 + 243 = 41310
Step 171: 41310 + 243 = 41553
Step 172: 41553 + 243 = 41796
Step 173: 41796 + 243 = 42039
Step 174: 42039 + 243 = 42282
Step 175: 42282 + 243 = 42525
Step 176: 42525 + 243 = 42768
Step 177: 42768 + 243 = 43011
Step 178: 43011 + 243 = 43254
Step 179: 43254 + 243 = 43497
Step 180: 43497 + 243 = 43740
Step 181: 43740 + 243 = 43983
Step 182: 43983 + 243 = 44226
Step 183: 44226 + 243 = 44469
Step 184: 44469 + 243 = 44712
Step 185: 44712 + 243 = 44955
Step 186: 44955 + 243 = 45198
Step 187: 45198 + 243 = 45441
Step 188: 45441 + 243 = 45684
Step 189: 45684 + 243 = 45927
Step 190: 45927 + 243 = 46170
Step 191: 46170 + 243 = 46413
Step 192: 46413 + 243 = 46656
Step 193: 46656 + 243 = 46899
Step 194: 46899 + 243 = 47142
Step 195: 47142 + 243 = 47385
Step 196: 47385 + 243 = 47628
Step 197: 47628 + 243 = 47871
Step 198: 47871 + 243 = 48114
Step 199: 48114 + 243 = 48357
Step 200: 48357 + 243 = 48600
Step 201: 48600 + 243 = 48843
Step 202: 48843 + 243 = 49086
Step 203: 49086 + 243 = 49329
Step 204: 49329 + 243 = 49572
Step 205: 49572 + 243 = 49815
Step 206: 49815 + 243 = 50058
Step 207: 50058 + 243 = 50301
Step 208: 50301 + 243 = 50544
Step 209: 50544 + 243 = 50787
Step 210: 50787 + 243 = 51030
Step 211: 51030 + 243 = 51273
Step 212: 51273 + 243 = 51516
Step 213: 51516 + 243 = 51759
Step 214: 51759 + 243 = 52002
Step 215: 52002 + 243 = 52245
Step 216: 52245 + 243 = 52488
Step 217: 52488 + 243 = 52731
Step 218: 52731 + 243 = 52974
Step 219: 52974 + 243 = 53217
Step 220: 53217 + 243 = 53460
Step 221: 53460 + 243 = 53703
Step 222: 53703 + 243 = 53946
Step 223: 53946 + 243 = 54189
Step 224: 54189 + 243 = 54432
Step 225: 54432 + 243 = 54675
Step 226: 54675 + 243 = 54918
Step 227: 54918 + 243 = 55161
Step 228: 55161 + 243 = 55404
Step 229: 55404 + 243 = 55647
Step 230: 55647 + 243 = 55890
Step 231: 55890 + 243 = 56133
Step 232: 56133 + 243 = 56376
Step 233: 56376 + 243 = 56619
Step 234: 56619 + 243 = 56862
Step 235: 56862 + 243 = 57105
Step 236: 57105 + 243 = 57348
Step 237: 57348 + 243 = 57591
Step 238: 57591 + 243 = 57834
Step 239: 57834 + 243 = 58077
Step 240: 58077 + 243 = 58320
Step 241: 58320 + 243 = 58563
Step 242: 58563 + 243 = 58806
Step 243: 58806 + 243 = 59049
Step 244: 59049 + 243 = 59292
Step 245: 59292 + 243 = 59535
Step 246: 59535 + 243 = 59778
Step 247: 59778 + 243 = 60021
Step 248: 60021 + 243 = 60264
Step 249: 60264 + 243 = 60507
Step 250: 60507 + 243 = 60750
Step 251: 60750 + 243 = 60993
Step 252: 60993 + 243 = 61236
Step 253: 61236 + 243 = 61479
Step 254: 61479 + 243 = 61722
Step 255: 61722 + 243 = 61965
Step 256: 61965 + 243 = 62208
Step 257: 62208 + 243 = 62451
Step 258: 62451 + 243 = 62694
Step 259: 62694 + 243 = 62937
Step 260: 62937 + 243 = 63180
Step 261: 63180 + 243 = 63423
Step 262: 63423 + 243 = 63666
Step 263: 63666 + 243 = 63909
Step 264: 63909 + 243 = 64152
Step 265: 64152 + 243 = 64395
Step 266: 64395 + 243 = 64638
Step 267: 64638 + 243 = 64881
Step 268: 64881 + 243 = 65124
Step 269: 65124 + 243 = 65367
Step 270: 65367 + 243 = 65610
Step 271: 65610 + 243 = 65853
Step 272: 65853 + 243 = 66096
Step 273: 66096 + 243 = 66339
Step 274: 66339 + 243 = 66582
Step 275: 66582 + 243 = 66825
Step 276: 66825 + 243 = 67068
Step 277: 67068 + 243 = 67311
Step 278: 67311 + 243 = 67554
Step 279: 67554 + 243 = 67797
Step 280: 67797 + 243 = 68040
Step 281: 68040 + 243 = 68283
Step 282: 68283 + 243 = 68526
Step 283: 68526 + 243 = 68769
Step 284: 68769 + 243 = 69012
Step 285: 69012 + 243 = 69255
Step 286: 69255 + 243 = 69498
Step 287: 69498 + 243 = 69741
Step 288: 69741 + 243 = 69984
Step 289: 69984 + 243 = 70227
Step 290: 70227 + 243 = 70470
Step 291: 70470 + 243 = 70713

So, 243*291 = 70713