OK, let's work through this together. We're starting with 307 and we're going to multiply it by 442, which means we add 307 to itself 442 times.
Step 1: 0 + 307 = 307
Step 2: 307 + 307 = 614
Step 3: 614 + 307 = 921
Step 4: 921 + 307 = 1228
Step 5: 1228 + 307 = 1535
Step 6: 1535 + 307 = 1842
Step 7: 1842 + 307 = 2149
Step 8: 2149 + 307 = 2456
Step 9: 2456 + 307 = 2763
Step 10: 2763 + 307 = 3070
Step 11: 3070 + 307 = 3377
Step 12: 3377 + 307 = 3684
Step 13: 3684 + 307 = 3991
Step 14: 3991 + 307 = 4298
Step 15: 4298 + 307 = 4605
Step 16: 4605 + 307 = 4912
Step 17: 4912 + 307 = 5219
Step 18: 5219 + 307 = 5526
Step 19: 5526 + 307 = 5833
Step 20: 5833 + 307 = 6140
Step 21: 6140 + 307 = 6447
Step 22: 6447 + 307 = 6754
Step 23: 6754 + 307 = 7061
Step 24: 7061 + 307 = 7368
Step 25: 7368 + 307 = 7675
Step 26: 7675 + 307 = 7982
Step 27: 7982 + 307 = 8289
Step 28: 8289 + 307 = 8596
Step 29: 8596 + 307 = 8903
Step 30: 8903 + 307 = 9210
Step 31: 9210 + 307 = 9517
Step 32: 9517 + 307 = 9824
Step 33: 9824 + 307 = 10131
Step 34: 10131 + 307 = 10438
Step 35: 10438 + 307 = 10745
Step 36: 10745 + 307 = 11052
Step 37: 11052 + 307 = 11359
Step 38: 11359 + 307 = 11666
Step 39: 11666 + 307 = 11973
Step 40: 11973 + 307 = 12280
Step 41: 12280 + 307 = 12587
Step 42: 12587 + 307 = 12894
Step 43: 12894 + 307 = 13201
Step 44: 13201 + 307 = 13508
Step 45: 13508 + 307 = 13815
Step 46: 13815 + 307 = 14122
Step 47: 14122 + 307 = 14429
Step 48: 14429 + 307 = 14736
Step 49: 14736 + 307 = 15043
Step 50: 15043 + 307 = 15350
Step 51: 15350 + 307 = 15657
Step 52: 15657 + 307 = 15964
Step 53: 15964 + 307 = 16271
Step 54: 16271 + 307 = 16578
Step 55: 16578 + 307 = 16885
Step 56: 16885 + 307 = 17192
Step 57: 17192 + 307 = 17499
Step 58: 17499 + 307 = 17806
Step 59: 17806 + 307 = 18113
Step 60: 18113 + 307 = 18420
Step 61: 18420 + 307 = 18727
Step 62: 18727 + 307 = 19034
Step 63: 19034 + 307 = 19341
Step 64: 19341 + 307 = 19648
Step 65: 19648 + 307 = 19955
Step 66: 19955 + 307 = 20262
Step 67: 20262 + 307 = 20569
Step 68: 20569 + 307 = 20876
Step 69: 20876 + 307 = 21183
Step 70: 21183 + 307 = 21490
Step 71: 21490 + 307 = 21797
Step 72: 21797 + 307 = 22104
Step 73: 22104 + 307 = 22411
Step 74: 22411 + 307 = 22718
Step 75: 22718 + 307 = 23025
Step 76: 23025 + 307 = 23332
Step 77: 23332 + 307 = 23639
Step 78: 23639 + 307 = 23946
Step 79: 23946 + 307 = 24253
Step 80: 24253 + 307 = 24560
Step 81: 24560 + 307 = 24867
Step 82: 24867 + 307 = 25174
Step 83: 25174 + 307 = 25481
Step 84: 25481 + 307 = 25788
Step 85: 25788 + 307 = 26095
Step 86: 26095 + 307 = 26402
Step 87: 26402 + 307 = 26709
Step 88: 26709 + 307 = 27016
Step 89: 27016 + 307 = 27323
Step 90: 27323 + 307 = 27630
Step 91: 27630 + 307 = 27937
Step 92: 27937 + 307 = 28244
Step 93: 28244 + 307 = 28551
Step 94: 28551 + 307 = 28858
Step 95: 28858 + 307 = 29165
Step 96: 29165 + 307 = 29472
Step 97: 29472 + 307 = 29779
Step 98: 29779 + 307 = 30086
Step 99: 30086 + 307 = 30393
Step 100: 30393 + 307 = 30700
Step 101: 30700 + 307 = 31007
Step 102: 31007 + 307 = 31314
Step 103: 31314 + 307 = 31621
Step 104: 31621 + 307 = 31928
Step 105: 31928 + 307 = 32235
Step 106: 32235 + 307 = 32542
Step 107: 32542 + 307 = 32849
Step 108: 32849 + 307 = 33156
Step 109: 33156 + 307 = 33463
Step 110: 33463 + 307 = 33770
Step 111: 33770 + 307 = 34077
Step 112: 34077 + 307 = 34384
Step 113: 34384 + 307 = 34691
Step 114: 34691 + 307 = 34998
Step 115: 34998 + 307 = 35305
Step 116: 35305 + 307 = 35612
Step 117: 35612 + 307 = 35919
Step 118: 35919 + 307 = 36226
Step 119: 36226 + 307 = 36533
Step 120: 36533 + 307 = 36840
Step 121: 36840 + 307 = 37147
Step 122: 37147 + 307 = 37454
Step 123: 37454 + 307 = 37761
Step 124: 37761 + 307 = 38068
Step 125: 38068 + 307 = 38375
Step 126: 38375 + 307 = 38682
Step 127: 38682 + 307 = 38989
Step 128: 38989 + 307 = 39296
Step 129: 39296 + 307 = 39603
Step 130: 39603 + 307 = 39910
Step 131: 39910 + 307 = 40217
Step 132: 40217 + 307 = 40524
Step 133: 40524 + 307 = 40831
Step 134: 40831 + 307 = 41138
Step 135: 41138 + 307 = 41445
Step 136: 41445 + 307 = 41752
Step 137: 41752 + 307 = 42059
Step 138: 42059 + 307 = 42366
Step 139: 42366 + 307 = 42673
Step 140: 42673 + 307 = 42980
Step 141: 42980 + 307 = 43287
Step 142: 43287 + 307 = 43594
Step 143: 43594 + 307 = 43901
Step 144: 43901 + 307 = 44208
Step 145: 44208 + 307 = 44515
Step 146: 44515 + 307 = 44822
Step 147: 44822 + 307 = 45129
Step 148: 45129 + 307 = 45436
Step 149: 45436 + 307 = 45743
Step 150: 45743 + 307 = 46050
Step 151: 46050 + 307 = 46357
Step 152: 46357 + 307 = 46664
Step 153: 46664 + 307 = 46971
Step 154: 46971 + 307 = 47278
Step 155: 47278 + 307 = 47585
Step 156: 47585 + 307 = 47892
Step 157: 47892 + 307 = 48199
Step 158: 48199 + 307 = 48506
Step 159: 48506 + 307 = 48813
Step 160: 48813 + 307 = 49120
Step 161: 49120 + 307 = 49427
Step 162: 49427 + 307 = 49734
Step 163: 49734 + 307 = 50041
Step 164: 50041 + 307 = 50348
Step 165: 50348 + 307 = 50655
Step 166: 50655 + 307 = 50962
Step 167: 50962 + 307 = 51269
Step 168: 51269 + 307 = 51576
Step 169: 51576 + 307 = 51883
Step 170: 51883 + 307 = 52190
Step 171: 52190 + 307 = 52497
Step 172: 52497 + 307 = 52804
Step 173: 52804 + 307 = 53111
Step 174: 53111 + 307 = 53418
Step 175: 53418 + 307 = 53725
Step 176: 53725 + 307 = 54032
Step 177: 54032 + 307 = 54339
Step 178: 54339 + 307 = 54646
Step 179: 54646 + 307 = 54953
Step 180: 54953 + 307 = 55260
Step 181: 55260 + 307 = 55567
Step 182: 55567 + 307 = 55874
Step 183: 55874 + 307 = 56181
Step 184: 56181 + 307 = 56488
Step 185: 56488 + 307 = 56795
Step 186: 56795 + 307 = 57102
Step 187: 57102 + 307 = 57409
Step 188: 57409 + 307 = 57716
Step 189: 57716 + 307 = 58023
Step 190: 58023 + 307 = 58330
Step 191: 58330 + 307 = 58637
Step 192: 58637 + 307 = 58944
Step 193: 58944 + 307 = 59251
Step 194: 59251 + 307 = 59558
Step 195: 59558 + 307 = 59865
Step 196: 59865 + 307 = 60172
Step 197: 60172 + 307 = 60479
Step 198: 60479 + 307 = 60786
Step 199: 60786 + 307 = 61093
Step 200: 61093 + 307 = 61400
Step 201: 61400 + 307 = 61707
Step 202: 61707 + 307 = 62014
Step 203: 62014 + 307 = 62321
Step 204: 62321 + 307 = 62628
Step 205: 62628 + 307 = 62935
Step 206: 62935 + 307 = 63242
Step 207: 63242 + 307 = 63549
Step 208: 63549 + 307 = 63856
Step 209: 63856 + 307 = 64163
Step 210: 64163 + 307 = 64470
Step 211: 64470 + 307 = 64777
Step 212: 64777 + 307 = 65084
Step 213: 65084 + 307 = 65391
Step 214: 65391 + 307 = 65698
Step 215: 65698 + 307 = 66005
Step 216: 66005 + 307 = 66312
Step 217: 66312 + 307 = 66619
Step 218: 66619 + 307 = 66926
Step 219: 66926 + 307 = 67233
Step 220: 67233 + 307 = 67540
Step 221: 67540 + 307 = 67847
Step 222: 67847 + 307 = 68154
Step 223: 68154 + 307 = 68461
Step 224: 68461 + 307 = 68768
Step 225: 68768 + 307 = 69075
Step 226: 69075 + 307 = 69382
Step 227: 69382 + 307 = 69689
Step 228: 69689 + 307 = 69996
Step 229: 69996 + 307 = 70303
Step 230: 70303 + 307 = 70610
Step 231: 70610 + 307 = 70917
Step 232: 70917 + 307 = 71224
Step 233: 71224 + 307 = 71531
Step 234: 71531 + 307 = 71838
Step 235: 71838 + 307 = 72145
Step 236: 72145 + 307 = 72452
Step 237: 72452 + 307 = 72759
Step 238: 72759 + 307 = 73066
Step 239: 73066 + 307 = 73373
Step 240: 73373 + 307 = 73680
Step 241: 73680 + 307 = 73987
Step 242: 73987 + 307 = 74294
Step 243: 74294 + 307 = 74601
Step 244: 74601 + 307 = 74908
Step 245: 74908 + 307 = 75215
Step 246: 75215 + 307 = 75522
Step 247: 75522 + 307 = 75829
Step 248: 75829 + 307 = 76136
Step 249: 76136 + 307 = 76443
Step 250: 76443 + 307 = 76750
Step 251: 76750 + 307 = 77057
Step 252: 77057 + 307 = 77364
Step 253: 77364 + 307 = 77671
Step 254: 77671 + 307 = 77978
Step 255: 77978 + 307 = 78285
Step 256: 78285 + 307 = 78592
Step 257: 78592 + 307 = 78899
Step 258: 78899 + 307 = 79206
Step 259: 79206 + 307 = 79513
Step 260: 79513 + 307 = 79820
Step 261: 79820 + 307 = 80127
Step 262: 80127 + 307 = 80434
Step 263: 80434 + 307 = 80741
Step 264: 80741 + 307 = 81048
Step 265: 81048 + 307 = 81355
Step 266: 81355 + 307 = 81662
Step 267: 81662 + 307 = 81969
Step 268: 81969 + 307 = 82276
Step 269: 82276 + 307 = 82583
Step 270: 82583 + 307 = 82890
Step 271: 82890 + 307 = 83197
Step 272: 83197 + 307 = 83504
Step 273: 83504 + 307 = 83811
Step 274: 83811 + 307 = 84118
Step 275: 84118 + 307 = 84425
Step 276: 84425 + 307 = 84732
Step 277: 84732 + 307 = 85039
Step 278: 85039 + 307 = 85346
Step 279: 85346 + 307 = 85653
Step 280: 85653 + 307 = 85960
Step 281: 85960 + 307 = 86267
Step 282: 86267 + 307 = 86574
Step 283: 86574 + 307 = 86881
Step 284: 86881 + 307 = 87188
Step 285: 87188 + 307 = 87495
Step 286: 87495 + 307 = 87802
Step 287: 87802 + 307 = 88109
Step 288: 88109 + 307 = 88416
Step 289: 88416 + 307 = 88723
Step 290: 88723 + 307 = 89030
Step 291: 89030 + 307 = 89337
Step 292: 89337 + 307 = 89644
Step 293: 89644 + 307 = 89951
Step 294: 89951 + 307 = 90258
Step 295: 90258 + 307 = 90565
Step 296: 90565 + 307 = 90872
Step 297: 90872 + 307 = 91179
Step 298: 91179 + 307 = 91486
Step 299: 91486 + 307 = 91793
Step 300: 91793 + 307 = 92100
Step 301: 92100 + 307 = 92407
Step 302: 92407 + 307 = 92714
Step 303: 92714 + 307 = 93021
Step 304: 93021 + 307 = 93328
Step 305: 93328 + 307 = 93635
Step 306: 93635 + 307 = 93942
Step 307: 93942 + 307 = 94249
Step 308: 94249 + 307 = 94556
Step 309: 94556 + 307 = 94863
Step 310: 94863 + 307 = 95170
Step 311: 95170 + 307 = 95477
Step 312: 95477 + 307 = 95784
Step 313: 95784 + 307 = 96091
Step 314: 96091 + 307 = 96398
Step 315: 96398 + 307 = 96705
Step 316: 96705 + 307 = 97012
Step 317: 97012 + 307 = 97319
Step 318: 97319 + 307 = 97626
Step 319: 97626 + 307 = 97933
Step 320: 97933 + 307 = 98240
Step 321: 98240 + 307 = 98547
Step 322: 98547 + 307 = 98854
Step 323: 98854 + 307 = 99161
Step 324: 99161 + 307 = 99468
Step 325: 99468 + 307 = 99775
Step 326: 99775 + 307 = 100082
Step 327: 100082 + 307 = 100389
Step 328: 100389 + 307 = 100696
Step 329: 100696 + 307 = 101003
Step 330: 101003 + 307 = 101310
Step 331: 101310 + 307 = 101617
Step 332: 101617 + 307 = 101924
Step 333: 101924 + 307 = 102231
Step 334: 102231 + 307 = 102538
Step 335: 102538 + 307 = 102845
Step 336: 102845 + 307 = 103152
Step 337: 103152 + 307 = 103459
Step 338: 103459 + 307 = 103766
Step 339: 103766 + 307 = 104073
Step 340: 104073 + 307 = 104380
Step 341: 104380 + 307 = 104687
Step 342: 104687 + 307 = 104994
Step 343: 104994 + 307 = 105301
Step 344: 105301 + 307 = 105608
Step 345: 105608 + 307 = 105915
Step 346: 105915 + 307 = 106222
Step 347: 106222 + 307 = 106529
Step 348: 106529 + 307 = 106836
Step 349: 106836 + 307 = 107143
Step 350: 107143 + 307 = 107450
Step 351: 107450 + 307 = 107757
Step 352: 107757 + 307 = 108064
Step 353: 108064 + 307 = 108371
Step 354: 108371 + 307 = 108678
Step 355: 108678 + 307 = 108985
Step 356: 108985 + 307 = 109292
Step 357: 109292 + 307 = 109599
Step 358: 109599 + 307 = 109906
Step 359: 109906 + 307 = 110213
Step 360: 110213 + 307 = 110520
Step 361: 110520 + 307 = 110827
Step 362: 110827 + 307 = 111134
Step 363: 111134 + 307 = 111441
Step 364: 111441 + 307 = 111748
Step 365: 111748 + 307 = 112055
Step 366: 112055 + 307 = 112362
Step 367: 112362 + 307 = 112669
Step 368: 112669 + 307 = 112976
Step 369: 112976 + 307 = 113283
Step 370: 113283 + 307 = 113590
Step 371: 113590 + 307 = 113897
Step 372: 113897 + 307 = 114204
Step 373: 114204 + 307 = 114511
Step 374: 114511 + 307 = 114818
Step 375: 114818 + 307 = 115125
Step 376: 115125 + 307 = 115432
Step 377: 115432 + 307 = 115739
Step 378: 115739 + 307 = 116046
Step 379: 116046 + 307 = 116353
Step 380: 116353 + 307 = 116660
Step 381: 116660 + 307 = 116967
Step 382: 116967 + 307 = 117274
Step 383: 117274 + 307 = 117581
Step 384: 117581 + 307 = 117888
Step 385: 117888 + 307 = 118195
Step 386: 118195 + 307 = 118502
Step 387: 118502 + 307 = 118809
Step 388: 118809 + 307 = 119116
Step 389: 119116 + 307 = 119423
Step 390: 119423 + 307 = 119730
Step 391: 119730 + 307 = 120037
Step 392: 120037 + 307 = 120344
Step 393: 120344 + 307 = 120651
Step 394: 120651 + 307 = 120958
Step 395: 120958 + 307 = 121265
Step 396: 121265 + 307 = 121572
Step 397: 121572 + 307 = 121879
Step 398: 121879 + 307 = 122186
Step 399: 122186 + 307 = 122493
Step 400: 122493 + 307 = 122800
Step 401: 122800 + 307 = 123107
Step 402: 123107 + 307 = 123414
Step 403: 123414 + 307 = 123721
Step 404: 123721 + 307 = 124028
Step 405: 124028 + 307 = 124335
Step 406: 124335 + 307 = 124642
Step 407: 124642 + 307 = 124949
Step 408: 124949 + 307 = 125256
Step 409: 125256 + 307 = 125563
Step 410: 125563 + 307 = 125870
Step 411: 125870 + 307 = 126177
Step 412: 126177 + 307 = 126484
Step 413: 126484 + 307 = 126791
Step 414: 126791 + 307 = 127098
Step 415: 127098 + 307 = 127405
Step 416: 127405 + 307 = 127712
Step 417: 127712 + 307 = 128019
Step 418: 128019 + 307 = 128326
Step 419: 128326 + 307 = 128633
Step 420: 128633 + 307 = 128940
Step 421: 128940 + 307 = 129247
Step 422: 129247 + 307 = 129554
Step 423: 129554 + 307 = 129861
Step 424: 129861 + 307 = 130168
Step 425: 130168 + 307 = 130475
Step 426: 130475 + 307 = 130782
Step 427: 130782 + 307 = 131089
Step 428: 131089 + 307 = 131396
Step 429: 131396 + 307 = 131703
Step 430: 131703 + 307 = 132010
Step 431: 132010 + 307 = 132317
Step 432: 132317 + 307 = 132624
Step 433: 132624 + 307 = 132931
Step 434: 132931 + 307 = 133238
Step 435: 133238 + 307 = 133545
Step 436: 133545 + 307 = 133852
Step 437: 133852 + 307 = 134159
Step 438: 134159 + 307 = 134466
Step 439: 134466 + 307 = 134773
Step 440: 134773 + 307 = 135080
Step 441: 135080 + 307 = 135387
Step 442: 135387 + 307 = 135694

So, 307*442 = 135694