Let's roll up our sleeves and solve this. We have 592 and we're going to multiply it by 421, essentially adding 592 to itself 421 times.
Step 1: 0 + 592 = 592
Step 2: 592 + 592 = 1184
Step 3: 1184 + 592 = 1776
Step 4: 1776 + 592 = 2368
Step 5: 2368 + 592 = 2960
Step 6: 2960 + 592 = 3552
Step 7: 3552 + 592 = 4144
Step 8: 4144 + 592 = 4736
Step 9: 4736 + 592 = 5328
Step 10: 5328 + 592 = 5920
Step 11: 5920 + 592 = 6512
Step 12: 6512 + 592 = 7104
Step 13: 7104 + 592 = 7696
Step 14: 7696 + 592 = 8288
Step 15: 8288 + 592 = 8880
Step 16: 8880 + 592 = 9472
Step 17: 9472 + 592 = 10064
Step 18: 10064 + 592 = 10656
Step 19: 10656 + 592 = 11248
Step 20: 11248 + 592 = 11840
Step 21: 11840 + 592 = 12432
Step 22: 12432 + 592 = 13024
Step 23: 13024 + 592 = 13616
Step 24: 13616 + 592 = 14208
Step 25: 14208 + 592 = 14800
Step 26: 14800 + 592 = 15392
Step 27: 15392 + 592 = 15984
Step 28: 15984 + 592 = 16576
Step 29: 16576 + 592 = 17168
Step 30: 17168 + 592 = 17760
Step 31: 17760 + 592 = 18352
Step 32: 18352 + 592 = 18944
Step 33: 18944 + 592 = 19536
Step 34: 19536 + 592 = 20128
Step 35: 20128 + 592 = 20720
Step 36: 20720 + 592 = 21312
Step 37: 21312 + 592 = 21904
Step 38: 21904 + 592 = 22496
Step 39: 22496 + 592 = 23088
Step 40: 23088 + 592 = 23680
Step 41: 23680 + 592 = 24272
Step 42: 24272 + 592 = 24864
Step 43: 24864 + 592 = 25456
Step 44: 25456 + 592 = 26048
Step 45: 26048 + 592 = 26640
Step 46: 26640 + 592 = 27232
Step 47: 27232 + 592 = 27824
Step 48: 27824 + 592 = 28416
Step 49: 28416 + 592 = 29008
Step 50: 29008 + 592 = 29600
Step 51: 29600 + 592 = 30192
Step 52: 30192 + 592 = 30784
Step 53: 30784 + 592 = 31376
Step 54: 31376 + 592 = 31968
Step 55: 31968 + 592 = 32560
Step 56: 32560 + 592 = 33152
Step 57: 33152 + 592 = 33744
Step 58: 33744 + 592 = 34336
Step 59: 34336 + 592 = 34928
Step 60: 34928 + 592 = 35520
Step 61: 35520 + 592 = 36112
Step 62: 36112 + 592 = 36704
Step 63: 36704 + 592 = 37296
Step 64: 37296 + 592 = 37888
Step 65: 37888 + 592 = 38480
Step 66: 38480 + 592 = 39072
Step 67: 39072 + 592 = 39664
Step 68: 39664 + 592 = 40256
Step 69: 40256 + 592 = 40848
Step 70: 40848 + 592 = 41440
Step 71: 41440 + 592 = 42032
Step 72: 42032 + 592 = 42624
Step 73: 42624 + 592 = 43216
Step 74: 43216 + 592 = 43808
Step 75: 43808 + 592 = 44400
Step 76: 44400 + 592 = 44992
Step 77: 44992 + 592 = 45584
Step 78: 45584 + 592 = 46176
Step 79: 46176 + 592 = 46768
Step 80: 46768 + 592 = 47360
Step 81: 47360 + 592 = 47952
Step 82: 47952 + 592 = 48544
Step 83: 48544 + 592 = 49136
Step 84: 49136 + 592 = 49728
Step 85: 49728 + 592 = 50320
Step 86: 50320 + 592 = 50912
Step 87: 50912 + 592 = 51504
Step 88: 51504 + 592 = 52096
Step 89: 52096 + 592 = 52688
Step 90: 52688 + 592 = 53280
Step 91: 53280 + 592 = 53872
Step 92: 53872 + 592 = 54464
Step 93: 54464 + 592 = 55056
Step 94: 55056 + 592 = 55648
Step 95: 55648 + 592 = 56240
Step 96: 56240 + 592 = 56832
Step 97: 56832 + 592 = 57424
Step 98: 57424 + 592 = 58016
Step 99: 58016 + 592 = 58608
Step 100: 58608 + 592 = 59200
Step 101: 59200 + 592 = 59792
Step 102: 59792 + 592 = 60384
Step 103: 60384 + 592 = 60976
Step 104: 60976 + 592 = 61568
Step 105: 61568 + 592 = 62160
Step 106: 62160 + 592 = 62752
Step 107: 62752 + 592 = 63344
Step 108: 63344 + 592 = 63936
Step 109: 63936 + 592 = 64528
Step 110: 64528 + 592 = 65120
Step 111: 65120 + 592 = 65712
Step 112: 65712 + 592 = 66304
Step 113: 66304 + 592 = 66896
Step 114: 66896 + 592 = 67488
Step 115: 67488 + 592 = 68080
Step 116: 68080 + 592 = 68672
Step 117: 68672 + 592 = 69264
Step 118: 69264 + 592 = 69856
Step 119: 69856 + 592 = 70448
Step 120: 70448 + 592 = 71040
Step 121: 71040 + 592 = 71632
Step 122: 71632 + 592 = 72224
Step 123: 72224 + 592 = 72816
Step 124: 72816 + 592 = 73408
Step 125: 73408 + 592 = 74000
Step 126: 74000 + 592 = 74592
Step 127: 74592 + 592 = 75184
Step 128: 75184 + 592 = 75776
Step 129: 75776 + 592 = 76368
Step 130: 76368 + 592 = 76960
Step 131: 76960 + 592 = 77552
Step 132: 77552 + 592 = 78144
Step 133: 78144 + 592 = 78736
Step 134: 78736 + 592 = 79328
Step 135: 79328 + 592 = 79920
Step 136: 79920 + 592 = 80512
Step 137: 80512 + 592 = 81104
Step 138: 81104 + 592 = 81696
Step 139: 81696 + 592 = 82288
Step 140: 82288 + 592 = 82880
Step 141: 82880 + 592 = 83472
Step 142: 83472 + 592 = 84064
Step 143: 84064 + 592 = 84656
Step 144: 84656 + 592 = 85248
Step 145: 85248 + 592 = 85840
Step 146: 85840 + 592 = 86432
Step 147: 86432 + 592 = 87024
Step 148: 87024 + 592 = 87616
Step 149: 87616 + 592 = 88208
Step 150: 88208 + 592 = 88800
Step 151: 88800 + 592 = 89392
Step 152: 89392 + 592 = 89984
Step 153: 89984 + 592 = 90576
Step 154: 90576 + 592 = 91168
Step 155: 91168 + 592 = 91760
Step 156: 91760 + 592 = 92352
Step 157: 92352 + 592 = 92944
Step 158: 92944 + 592 = 93536
Step 159: 93536 + 592 = 94128
Step 160: 94128 + 592 = 94720
Step 161: 94720 + 592 = 95312
Step 162: 95312 + 592 = 95904
Step 163: 95904 + 592 = 96496
Step 164: 96496 + 592 = 97088
Step 165: 97088 + 592 = 97680
Step 166: 97680 + 592 = 98272
Step 167: 98272 + 592 = 98864
Step 168: 98864 + 592 = 99456
Step 169: 99456 + 592 = 100048
Step 170: 100048 + 592 = 100640
Step 171: 100640 + 592 = 101232
Step 172: 101232 + 592 = 101824
Step 173: 101824 + 592 = 102416
Step 174: 102416 + 592 = 103008
Step 175: 103008 + 592 = 103600
Step 176: 103600 + 592 = 104192
Step 177: 104192 + 592 = 104784
Step 178: 104784 + 592 = 105376
Step 179: 105376 + 592 = 105968
Step 180: 105968 + 592 = 106560
Step 181: 106560 + 592 = 107152
Step 182: 107152 + 592 = 107744
Step 183: 107744 + 592 = 108336
Step 184: 108336 + 592 = 108928
Step 185: 108928 + 592 = 109520
Step 186: 109520 + 592 = 110112
Step 187: 110112 + 592 = 110704
Step 188: 110704 + 592 = 111296
Step 189: 111296 + 592 = 111888
Step 190: 111888 + 592 = 112480
Step 191: 112480 + 592 = 113072
Step 192: 113072 + 592 = 113664
Step 193: 113664 + 592 = 114256
Step 194: 114256 + 592 = 114848
Step 195: 114848 + 592 = 115440
Step 196: 115440 + 592 = 116032
Step 197: 116032 + 592 = 116624
Step 198: 116624 + 592 = 117216
Step 199: 117216 + 592 = 117808
Step 200: 117808 + 592 = 118400
Step 201: 118400 + 592 = 118992
Step 202: 118992 + 592 = 119584
Step 203: 119584 + 592 = 120176
Step 204: 120176 + 592 = 120768
Step 205: 120768 + 592 = 121360
Step 206: 121360 + 592 = 121952
Step 207: 121952 + 592 = 122544
Step 208: 122544 + 592 = 123136
Step 209: 123136 + 592 = 123728
Step 210: 123728 + 592 = 124320
Step 211: 124320 + 592 = 124912
Step 212: 124912 + 592 = 125504
Step 213: 125504 + 592 = 126096
Step 214: 126096 + 592 = 126688
Step 215: 126688 + 592 = 127280
Step 216: 127280 + 592 = 127872
Step 217: 127872 + 592 = 128464
Step 218: 128464 + 592 = 129056
Step 219: 129056 + 592 = 129648
Step 220: 129648 + 592 = 130240
Step 221: 130240 + 592 = 130832
Step 222: 130832 + 592 = 131424
Step 223: 131424 + 592 = 132016
Step 224: 132016 + 592 = 132608
Step 225: 132608 + 592 = 133200
Step 226: 133200 + 592 = 133792
Step 227: 133792 + 592 = 134384
Step 228: 134384 + 592 = 134976
Step 229: 134976 + 592 = 135568
Step 230: 135568 + 592 = 136160
Step 231: 136160 + 592 = 136752
Step 232: 136752 + 592 = 137344
Step 233: 137344 + 592 = 137936
Step 234: 137936 + 592 = 138528
Step 235: 138528 + 592 = 139120
Step 236: 139120 + 592 = 139712
Step 237: 139712 + 592 = 140304
Step 238: 140304 + 592 = 140896
Step 239: 140896 + 592 = 141488
Step 240: 141488 + 592 = 142080
Step 241: 142080 + 592 = 142672
Step 242: 142672 + 592 = 143264
Step 243: 143264 + 592 = 143856
Step 244: 143856 + 592 = 144448
Step 245: 144448 + 592 = 145040
Step 246: 145040 + 592 = 145632
Step 247: 145632 + 592 = 146224
Step 248: 146224 + 592 = 146816
Step 249: 146816 + 592 = 147408
Step 250: 147408 + 592 = 148000
Step 251: 148000 + 592 = 148592
Step 252: 148592 + 592 = 149184
Step 253: 149184 + 592 = 149776
Step 254: 149776 + 592 = 150368
Step 255: 150368 + 592 = 150960
Step 256: 150960 + 592 = 151552
Step 257: 151552 + 592 = 152144
Step 258: 152144 + 592 = 152736
Step 259: 152736 + 592 = 153328
Step 260: 153328 + 592 = 153920
Step 261: 153920 + 592 = 154512
Step 262: 154512 + 592 = 155104
Step 263: 155104 + 592 = 155696
Step 264: 155696 + 592 = 156288
Step 265: 156288 + 592 = 156880
Step 266: 156880 + 592 = 157472
Step 267: 157472 + 592 = 158064
Step 268: 158064 + 592 = 158656
Step 269: 158656 + 592 = 159248
Step 270: 159248 + 592 = 159840
Step 271: 159840 + 592 = 160432
Step 272: 160432 + 592 = 161024
Step 273: 161024 + 592 = 161616
Step 274: 161616 + 592 = 162208
Step 275: 162208 + 592 = 162800
Step 276: 162800 + 592 = 163392
Step 277: 163392 + 592 = 163984
Step 278: 163984 + 592 = 164576
Step 279: 164576 + 592 = 165168
Step 280: 165168 + 592 = 165760
Step 281: 165760 + 592 = 166352
Step 282: 166352 + 592 = 166944
Step 283: 166944 + 592 = 167536
Step 284: 167536 + 592 = 168128
Step 285: 168128 + 592 = 168720
Step 286: 168720 + 592 = 169312
Step 287: 169312 + 592 = 169904
Step 288: 169904 + 592 = 170496
Step 289: 170496 + 592 = 171088
Step 290: 171088 + 592 = 171680
Step 291: 171680 + 592 = 172272
Step 292: 172272 + 592 = 172864
Step 293: 172864 + 592 = 173456
Step 294: 173456 + 592 = 174048
Step 295: 174048 + 592 = 174640
Step 296: 174640 + 592 = 175232
Step 297: 175232 + 592 = 175824
Step 298: 175824 + 592 = 176416
Step 299: 176416 + 592 = 177008
Step 300: 177008 + 592 = 177600
Step 301: 177600 + 592 = 178192
Step 302: 178192 + 592 = 178784
Step 303: 178784 + 592 = 179376
Step 304: 179376 + 592 = 179968
Step 305: 179968 + 592 = 180560
Step 306: 180560 + 592 = 181152
Step 307: 181152 + 592 = 181744
Step 308: 181744 + 592 = 182336
Step 309: 182336 + 592 = 182928
Step 310: 182928 + 592 = 183520
Step 311: 183520 + 592 = 184112
Step 312: 184112 + 592 = 184704
Step 313: 184704 + 592 = 185296
Step 314: 185296 + 592 = 185888
Step 315: 185888 + 592 = 186480
Step 316: 186480 + 592 = 187072
Step 317: 187072 + 592 = 187664
Step 318: 187664 + 592 = 188256
Step 319: 188256 + 592 = 188848
Step 320: 188848 + 592 = 189440
Step 321: 189440 + 592 = 190032
Step 322: 190032 + 592 = 190624
Step 323: 190624 + 592 = 191216
Step 324: 191216 + 592 = 191808
Step 325: 191808 + 592 = 192400
Step 326: 192400 + 592 = 192992
Step 327: 192992 + 592 = 193584
Step 328: 193584 + 592 = 194176
Step 329: 194176 + 592 = 194768
Step 330: 194768 + 592 = 195360
Step 331: 195360 + 592 = 195952
Step 332: 195952 + 592 = 196544
Step 333: 196544 + 592 = 197136
Step 334: 197136 + 592 = 197728
Step 335: 197728 + 592 = 198320
Step 336: 198320 + 592 = 198912
Step 337: 198912 + 592 = 199504
Step 338: 199504 + 592 = 200096
Step 339: 200096 + 592 = 200688
Step 340: 200688 + 592 = 201280
Step 341: 201280 + 592 = 201872
Step 342: 201872 + 592 = 202464
Step 343: 202464 + 592 = 203056
Step 344: 203056 + 592 = 203648
Step 345: 203648 + 592 = 204240
Step 346: 204240 + 592 = 204832
Step 347: 204832 + 592 = 205424
Step 348: 205424 + 592 = 206016
Step 349: 206016 + 592 = 206608
Step 350: 206608 + 592 = 207200
Step 351: 207200 + 592 = 207792
Step 352: 207792 + 592 = 208384
Step 353: 208384 + 592 = 208976
Step 354: 208976 + 592 = 209568
Step 355: 209568 + 592 = 210160
Step 356: 210160 + 592 = 210752
Step 357: 210752 + 592 = 211344
Step 358: 211344 + 592 = 211936
Step 359: 211936 + 592 = 212528
Step 360: 212528 + 592 = 213120
Step 361: 213120 + 592 = 213712
Step 362: 213712 + 592 = 214304
Step 363: 214304 + 592 = 214896
Step 364: 214896 + 592 = 215488
Step 365: 215488 + 592 = 216080
Step 366: 216080 + 592 = 216672
Step 367: 216672 + 592 = 217264
Step 368: 217264 + 592 = 217856
Step 369: 217856 + 592 = 218448
Step 370: 218448 + 592 = 219040
Step 371: 219040 + 592 = 219632
Step 372: 219632 + 592 = 220224
Step 373: 220224 + 592 = 220816
Step 374: 220816 + 592 = 221408
Step 375: 221408 + 592 = 222000
Step 376: 222000 + 592 = 222592
Step 377: 222592 + 592 = 223184
Step 378: 223184 + 592 = 223776
Step 379: 223776 + 592 = 224368
Step 380: 224368 + 592 = 224960
Step 381: 224960 + 592 = 225552
Step 382: 225552 + 592 = 226144
Step 383: 226144 + 592 = 226736
Step 384: 226736 + 592 = 227328
Step 385: 227328 + 592 = 227920
Step 386: 227920 + 592 = 228512
Step 387: 228512 + 592 = 229104
Step 388: 229104 + 592 = 229696
Step 389: 229696 + 592 = 230288
Step 390: 230288 + 592 = 230880
Step 391: 230880 + 592 = 231472
Step 392: 231472 + 592 = 232064
Step 393: 232064 + 592 = 232656
Step 394: 232656 + 592 = 233248
Step 395: 233248 + 592 = 233840
Step 396: 233840 + 592 = 234432
Step 397: 234432 + 592 = 235024
Step 398: 235024 + 592 = 235616
Step 399: 235616 + 592 = 236208
Step 400: 236208 + 592 = 236800
Step 401: 236800 + 592 = 237392
Step 402: 237392 + 592 = 237984
Step 403: 237984 + 592 = 238576
Step 404: 238576 + 592 = 239168
Step 405: 239168 + 592 = 239760
Step 406: 239760 + 592 = 240352
Step 407: 240352 + 592 = 240944
Step 408: 240944 + 592 = 241536
Step 409: 241536 + 592 = 242128
Step 410: 242128 + 592 = 242720
Step 411: 242720 + 592 = 243312
Step 412: 243312 + 592 = 243904
Step 413: 243904 + 592 = 244496
Step 414: 244496 + 592 = 245088
Step 415: 245088 + 592 = 245680
Step 416: 245680 + 592 = 246272
Step 417: 246272 + 592 = 246864
Step 418: 246864 + 592 = 247456
Step 419: 247456 + 592 = 248048
Step 420: 248048 + 592 = 248640
Step 421: 248640 + 592 = 249232

So, 592*421 = 249232