Let's roll up our sleeves and solve this. We have 887 and we're going to multiply it by 344, essentially adding 887 to itself 344 times.
Step 1: 0 + 887 = 887
Step 2: 887 + 887 = 1774
Step 3: 1774 + 887 = 2661
Step 4: 2661 + 887 = 3548
Step 5: 3548 + 887 = 4435
Step 6: 4435 + 887 = 5322
Step 7: 5322 + 887 = 6209
Step 8: 6209 + 887 = 7096
Step 9: 7096 + 887 = 7983
Step 10: 7983 + 887 = 8870
Step 11: 8870 + 887 = 9757
Step 12: 9757 + 887 = 10644
Step 13: 10644 + 887 = 11531
Step 14: 11531 + 887 = 12418
Step 15: 12418 + 887 = 13305
Step 16: 13305 + 887 = 14192
Step 17: 14192 + 887 = 15079
Step 18: 15079 + 887 = 15966
Step 19: 15966 + 887 = 16853
Step 20: 16853 + 887 = 17740
Step 21: 17740 + 887 = 18627
Step 22: 18627 + 887 = 19514
Step 23: 19514 + 887 = 20401
Step 24: 20401 + 887 = 21288
Step 25: 21288 + 887 = 22175
Step 26: 22175 + 887 = 23062
Step 27: 23062 + 887 = 23949
Step 28: 23949 + 887 = 24836
Step 29: 24836 + 887 = 25723
Step 30: 25723 + 887 = 26610
Step 31: 26610 + 887 = 27497
Step 32: 27497 + 887 = 28384
Step 33: 28384 + 887 = 29271
Step 34: 29271 + 887 = 30158
Step 35: 30158 + 887 = 31045
Step 36: 31045 + 887 = 31932
Step 37: 31932 + 887 = 32819
Step 38: 32819 + 887 = 33706
Step 39: 33706 + 887 = 34593
Step 40: 34593 + 887 = 35480
Step 41: 35480 + 887 = 36367
Step 42: 36367 + 887 = 37254
Step 43: 37254 + 887 = 38141
Step 44: 38141 + 887 = 39028
Step 45: 39028 + 887 = 39915
Step 46: 39915 + 887 = 40802
Step 47: 40802 + 887 = 41689
Step 48: 41689 + 887 = 42576
Step 49: 42576 + 887 = 43463
Step 50: 43463 + 887 = 44350
Step 51: 44350 + 887 = 45237
Step 52: 45237 + 887 = 46124
Step 53: 46124 + 887 = 47011
Step 54: 47011 + 887 = 47898
Step 55: 47898 + 887 = 48785
Step 56: 48785 + 887 = 49672
Step 57: 49672 + 887 = 50559
Step 58: 50559 + 887 = 51446
Step 59: 51446 + 887 = 52333
Step 60: 52333 + 887 = 53220
Step 61: 53220 + 887 = 54107
Step 62: 54107 + 887 = 54994
Step 63: 54994 + 887 = 55881
Step 64: 55881 + 887 = 56768
Step 65: 56768 + 887 = 57655
Step 66: 57655 + 887 = 58542
Step 67: 58542 + 887 = 59429
Step 68: 59429 + 887 = 60316
Step 69: 60316 + 887 = 61203
Step 70: 61203 + 887 = 62090
Step 71: 62090 + 887 = 62977
Step 72: 62977 + 887 = 63864
Step 73: 63864 + 887 = 64751
Step 74: 64751 + 887 = 65638
Step 75: 65638 + 887 = 66525
Step 76: 66525 + 887 = 67412
Step 77: 67412 + 887 = 68299
Step 78: 68299 + 887 = 69186
Step 79: 69186 + 887 = 70073
Step 80: 70073 + 887 = 70960
Step 81: 70960 + 887 = 71847
Step 82: 71847 + 887 = 72734
Step 83: 72734 + 887 = 73621
Step 84: 73621 + 887 = 74508
Step 85: 74508 + 887 = 75395
Step 86: 75395 + 887 = 76282
Step 87: 76282 + 887 = 77169
Step 88: 77169 + 887 = 78056
Step 89: 78056 + 887 = 78943
Step 90: 78943 + 887 = 79830
Step 91: 79830 + 887 = 80717
Step 92: 80717 + 887 = 81604
Step 93: 81604 + 887 = 82491
Step 94: 82491 + 887 = 83378
Step 95: 83378 + 887 = 84265
Step 96: 84265 + 887 = 85152
Step 97: 85152 + 887 = 86039
Step 98: 86039 + 887 = 86926
Step 99: 86926 + 887 = 87813
Step 100: 87813 + 887 = 88700
Step 101: 88700 + 887 = 89587
Step 102: 89587 + 887 = 90474
Step 103: 90474 + 887 = 91361
Step 104: 91361 + 887 = 92248
Step 105: 92248 + 887 = 93135
Step 106: 93135 + 887 = 94022
Step 107: 94022 + 887 = 94909
Step 108: 94909 + 887 = 95796
Step 109: 95796 + 887 = 96683
Step 110: 96683 + 887 = 97570
Step 111: 97570 + 887 = 98457
Step 112: 98457 + 887 = 99344
Step 113: 99344 + 887 = 100231
Step 114: 100231 + 887 = 101118
Step 115: 101118 + 887 = 102005
Step 116: 102005 + 887 = 102892
Step 117: 102892 + 887 = 103779
Step 118: 103779 + 887 = 104666
Step 119: 104666 + 887 = 105553
Step 120: 105553 + 887 = 106440
Step 121: 106440 + 887 = 107327
Step 122: 107327 + 887 = 108214
Step 123: 108214 + 887 = 109101
Step 124: 109101 + 887 = 109988
Step 125: 109988 + 887 = 110875
Step 126: 110875 + 887 = 111762
Step 127: 111762 + 887 = 112649
Step 128: 112649 + 887 = 113536
Step 129: 113536 + 887 = 114423
Step 130: 114423 + 887 = 115310
Step 131: 115310 + 887 = 116197
Step 132: 116197 + 887 = 117084
Step 133: 117084 + 887 = 117971
Step 134: 117971 + 887 = 118858
Step 135: 118858 + 887 = 119745
Step 136: 119745 + 887 = 120632
Step 137: 120632 + 887 = 121519
Step 138: 121519 + 887 = 122406
Step 139: 122406 + 887 = 123293
Step 140: 123293 + 887 = 124180
Step 141: 124180 + 887 = 125067
Step 142: 125067 + 887 = 125954
Step 143: 125954 + 887 = 126841
Step 144: 126841 + 887 = 127728
Step 145: 127728 + 887 = 128615
Step 146: 128615 + 887 = 129502
Step 147: 129502 + 887 = 130389
Step 148: 130389 + 887 = 131276
Step 149: 131276 + 887 = 132163
Step 150: 132163 + 887 = 133050
Step 151: 133050 + 887 = 133937
Step 152: 133937 + 887 = 134824
Step 153: 134824 + 887 = 135711
Step 154: 135711 + 887 = 136598
Step 155: 136598 + 887 = 137485
Step 156: 137485 + 887 = 138372
Step 157: 138372 + 887 = 139259
Step 158: 139259 + 887 = 140146
Step 159: 140146 + 887 = 141033
Step 160: 141033 + 887 = 141920
Step 161: 141920 + 887 = 142807
Step 162: 142807 + 887 = 143694
Step 163: 143694 + 887 = 144581
Step 164: 144581 + 887 = 145468
Step 165: 145468 + 887 = 146355
Step 166: 146355 + 887 = 147242
Step 167: 147242 + 887 = 148129
Step 168: 148129 + 887 = 149016
Step 169: 149016 + 887 = 149903
Step 170: 149903 + 887 = 150790
Step 171: 150790 + 887 = 151677
Step 172: 151677 + 887 = 152564
Step 173: 152564 + 887 = 153451
Step 174: 153451 + 887 = 154338
Step 175: 154338 + 887 = 155225
Step 176: 155225 + 887 = 156112
Step 177: 156112 + 887 = 156999
Step 178: 156999 + 887 = 157886
Step 179: 157886 + 887 = 158773
Step 180: 158773 + 887 = 159660
Step 181: 159660 + 887 = 160547
Step 182: 160547 + 887 = 161434
Step 183: 161434 + 887 = 162321
Step 184: 162321 + 887 = 163208
Step 185: 163208 + 887 = 164095
Step 186: 164095 + 887 = 164982
Step 187: 164982 + 887 = 165869
Step 188: 165869 + 887 = 166756
Step 189: 166756 + 887 = 167643
Step 190: 167643 + 887 = 168530
Step 191: 168530 + 887 = 169417
Step 192: 169417 + 887 = 170304
Step 193: 170304 + 887 = 171191
Step 194: 171191 + 887 = 172078
Step 195: 172078 + 887 = 172965
Step 196: 172965 + 887 = 173852
Step 197: 173852 + 887 = 174739
Step 198: 174739 + 887 = 175626
Step 199: 175626 + 887 = 176513
Step 200: 176513 + 887 = 177400
Step 201: 177400 + 887 = 178287
Step 202: 178287 + 887 = 179174
Step 203: 179174 + 887 = 180061
Step 204: 180061 + 887 = 180948
Step 205: 180948 + 887 = 181835
Step 206: 181835 + 887 = 182722
Step 207: 182722 + 887 = 183609
Step 208: 183609 + 887 = 184496
Step 209: 184496 + 887 = 185383
Step 210: 185383 + 887 = 186270
Step 211: 186270 + 887 = 187157
Step 212: 187157 + 887 = 188044
Step 213: 188044 + 887 = 188931
Step 214: 188931 + 887 = 189818
Step 215: 189818 + 887 = 190705
Step 216: 190705 + 887 = 191592
Step 217: 191592 + 887 = 192479
Step 218: 192479 + 887 = 193366
Step 219: 193366 + 887 = 194253
Step 220: 194253 + 887 = 195140
Step 221: 195140 + 887 = 196027
Step 222: 196027 + 887 = 196914
Step 223: 196914 + 887 = 197801
Step 224: 197801 + 887 = 198688
Step 225: 198688 + 887 = 199575
Step 226: 199575 + 887 = 200462
Step 227: 200462 + 887 = 201349
Step 228: 201349 + 887 = 202236
Step 229: 202236 + 887 = 203123
Step 230: 203123 + 887 = 204010
Step 231: 204010 + 887 = 204897
Step 232: 204897 + 887 = 205784
Step 233: 205784 + 887 = 206671
Step 234: 206671 + 887 = 207558
Step 235: 207558 + 887 = 208445
Step 236: 208445 + 887 = 209332
Step 237: 209332 + 887 = 210219
Step 238: 210219 + 887 = 211106
Step 239: 211106 + 887 = 211993
Step 240: 211993 + 887 = 212880
Step 241: 212880 + 887 = 213767
Step 242: 213767 + 887 = 214654
Step 243: 214654 + 887 = 215541
Step 244: 215541 + 887 = 216428
Step 245: 216428 + 887 = 217315
Step 246: 217315 + 887 = 218202
Step 247: 218202 + 887 = 219089
Step 248: 219089 + 887 = 219976
Step 249: 219976 + 887 = 220863
Step 250: 220863 + 887 = 221750
Step 251: 221750 + 887 = 222637
Step 252: 222637 + 887 = 223524
Step 253: 223524 + 887 = 224411
Step 254: 224411 + 887 = 225298
Step 255: 225298 + 887 = 226185
Step 256: 226185 + 887 = 227072
Step 257: 227072 + 887 = 227959
Step 258: 227959 + 887 = 228846
Step 259: 228846 + 887 = 229733
Step 260: 229733 + 887 = 230620
Step 261: 230620 + 887 = 231507
Step 262: 231507 + 887 = 232394
Step 263: 232394 + 887 = 233281
Step 264: 233281 + 887 = 234168
Step 265: 234168 + 887 = 235055
Step 266: 235055 + 887 = 235942
Step 267: 235942 + 887 = 236829
Step 268: 236829 + 887 = 237716
Step 269: 237716 + 887 = 238603
Step 270: 238603 + 887 = 239490
Step 271: 239490 + 887 = 240377
Step 272: 240377 + 887 = 241264
Step 273: 241264 + 887 = 242151
Step 274: 242151 + 887 = 243038
Step 275: 243038 + 887 = 243925
Step 276: 243925 + 887 = 244812
Step 277: 244812 + 887 = 245699
Step 278: 245699 + 887 = 246586
Step 279: 246586 + 887 = 247473
Step 280: 247473 + 887 = 248360
Step 281: 248360 + 887 = 249247
Step 282: 249247 + 887 = 250134
Step 283: 250134 + 887 = 251021
Step 284: 251021 + 887 = 251908
Step 285: 251908 + 887 = 252795
Step 286: 252795 + 887 = 253682
Step 287: 253682 + 887 = 254569
Step 288: 254569 + 887 = 255456
Step 289: 255456 + 887 = 256343
Step 290: 256343 + 887 = 257230
Step 291: 257230 + 887 = 258117
Step 292: 258117 + 887 = 259004
Step 293: 259004 + 887 = 259891
Step 294: 259891 + 887 = 260778
Step 295: 260778 + 887 = 261665
Step 296: 261665 + 887 = 262552
Step 297: 262552 + 887 = 263439
Step 298: 263439 + 887 = 264326
Step 299: 264326 + 887 = 265213
Step 300: 265213 + 887 = 266100
Step 301: 266100 + 887 = 266987
Step 302: 266987 + 887 = 267874
Step 303: 267874 + 887 = 268761
Step 304: 268761 + 887 = 269648
Step 305: 269648 + 887 = 270535
Step 306: 270535 + 887 = 271422
Step 307: 271422 + 887 = 272309
Step 308: 272309 + 887 = 273196
Step 309: 273196 + 887 = 274083
Step 310: 274083 + 887 = 274970
Step 311: 274970 + 887 = 275857
Step 312: 275857 + 887 = 276744
Step 313: 276744 + 887 = 277631
Step 314: 277631 + 887 = 278518
Step 315: 278518 + 887 = 279405
Step 316: 279405 + 887 = 280292
Step 317: 280292 + 887 = 281179
Step 318: 281179 + 887 = 282066
Step 319: 282066 + 887 = 282953
Step 320: 282953 + 887 = 283840
Step 321: 283840 + 887 = 284727
Step 322: 284727 + 887 = 285614
Step 323: 285614 + 887 = 286501
Step 324: 286501 + 887 = 287388
Step 325: 287388 + 887 = 288275
Step 326: 288275 + 887 = 289162
Step 327: 289162 + 887 = 290049
Step 328: 290049 + 887 = 290936
Step 329: 290936 + 887 = 291823
Step 330: 291823 + 887 = 292710
Step 331: 292710 + 887 = 293597
Step 332: 293597 + 887 = 294484
Step 333: 294484 + 887 = 295371
Step 334: 295371 + 887 = 296258
Step 335: 296258 + 887 = 297145
Step 336: 297145 + 887 = 298032
Step 337: 298032 + 887 = 298919
Step 338: 298919 + 887 = 299806
Step 339: 299806 + 887 = 300693
Step 340: 300693 + 887 = 301580
Step 341: 301580 + 887 = 302467
Step 342: 302467 + 887 = 303354
Step 343: 303354 + 887 = 304241
Step 344: 304241 + 887 = 305128

So, 887*344 = 305128