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 140. So, we're going to take the number 243 and add it to itself 140 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

So, 243*140 = 34020