Alright, let's solve this math problem step by step. First, we have the number 866. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 344. So, we're going to take the number 866 and add it to itself 344 times.
Step 1: 0 + 866 = 866
Step 2: 866 + 866 = 1732
Step 3: 1732 + 866 = 2598
Step 4: 2598 + 866 = 3464
Step 5: 3464 + 866 = 4330
Step 6: 4330 + 866 = 5196
Step 7: 5196 + 866 = 6062
Step 8: 6062 + 866 = 6928
Step 9: 6928 + 866 = 7794
Step 10: 7794 + 866 = 8660
Step 11: 8660 + 866 = 9526
Step 12: 9526 + 866 = 10392
Step 13: 10392 + 866 = 11258
Step 14: 11258 + 866 = 12124
Step 15: 12124 + 866 = 12990
Step 16: 12990 + 866 = 13856
Step 17: 13856 + 866 = 14722
Step 18: 14722 + 866 = 15588
Step 19: 15588 + 866 = 16454
Step 20: 16454 + 866 = 17320
Step 21: 17320 + 866 = 18186
Step 22: 18186 + 866 = 19052
Step 23: 19052 + 866 = 19918
Step 24: 19918 + 866 = 20784
Step 25: 20784 + 866 = 21650
Step 26: 21650 + 866 = 22516
Step 27: 22516 + 866 = 23382
Step 28: 23382 + 866 = 24248
Step 29: 24248 + 866 = 25114
Step 30: 25114 + 866 = 25980
Step 31: 25980 + 866 = 26846
Step 32: 26846 + 866 = 27712
Step 33: 27712 + 866 = 28578
Step 34: 28578 + 866 = 29444
Step 35: 29444 + 866 = 30310
Step 36: 30310 + 866 = 31176
Step 37: 31176 + 866 = 32042
Step 38: 32042 + 866 = 32908
Step 39: 32908 + 866 = 33774
Step 40: 33774 + 866 = 34640
Step 41: 34640 + 866 = 35506
Step 42: 35506 + 866 = 36372
Step 43: 36372 + 866 = 37238
Step 44: 37238 + 866 = 38104
Step 45: 38104 + 866 = 38970
Step 46: 38970 + 866 = 39836
Step 47: 39836 + 866 = 40702
Step 48: 40702 + 866 = 41568
Step 49: 41568 + 866 = 42434
Step 50: 42434 + 866 = 43300
Step 51: 43300 + 866 = 44166
Step 52: 44166 + 866 = 45032
Step 53: 45032 + 866 = 45898
Step 54: 45898 + 866 = 46764
Step 55: 46764 + 866 = 47630
Step 56: 47630 + 866 = 48496
Step 57: 48496 + 866 = 49362
Step 58: 49362 + 866 = 50228
Step 59: 50228 + 866 = 51094
Step 60: 51094 + 866 = 51960
Step 61: 51960 + 866 = 52826
Step 62: 52826 + 866 = 53692
Step 63: 53692 + 866 = 54558
Step 64: 54558 + 866 = 55424
Step 65: 55424 + 866 = 56290
Step 66: 56290 + 866 = 57156
Step 67: 57156 + 866 = 58022
Step 68: 58022 + 866 = 58888
Step 69: 58888 + 866 = 59754
Step 70: 59754 + 866 = 60620
Step 71: 60620 + 866 = 61486
Step 72: 61486 + 866 = 62352
Step 73: 62352 + 866 = 63218
Step 74: 63218 + 866 = 64084
Step 75: 64084 + 866 = 64950
Step 76: 64950 + 866 = 65816
Step 77: 65816 + 866 = 66682
Step 78: 66682 + 866 = 67548
Step 79: 67548 + 866 = 68414
Step 80: 68414 + 866 = 69280
Step 81: 69280 + 866 = 70146
Step 82: 70146 + 866 = 71012
Step 83: 71012 + 866 = 71878
Step 84: 71878 + 866 = 72744
Step 85: 72744 + 866 = 73610
Step 86: 73610 + 866 = 74476
Step 87: 74476 + 866 = 75342
Step 88: 75342 + 866 = 76208
Step 89: 76208 + 866 = 77074
Step 90: 77074 + 866 = 77940
Step 91: 77940 + 866 = 78806
Step 92: 78806 + 866 = 79672
Step 93: 79672 + 866 = 80538
Step 94: 80538 + 866 = 81404
Step 95: 81404 + 866 = 82270
Step 96: 82270 + 866 = 83136
Step 97: 83136 + 866 = 84002
Step 98: 84002 + 866 = 84868
Step 99: 84868 + 866 = 85734
Step 100: 85734 + 866 = 86600
Step 101: 86600 + 866 = 87466
Step 102: 87466 + 866 = 88332
Step 103: 88332 + 866 = 89198
Step 104: 89198 + 866 = 90064
Step 105: 90064 + 866 = 90930
Step 106: 90930 + 866 = 91796
Step 107: 91796 + 866 = 92662
Step 108: 92662 + 866 = 93528
Step 109: 93528 + 866 = 94394
Step 110: 94394 + 866 = 95260
Step 111: 95260 + 866 = 96126
Step 112: 96126 + 866 = 96992
Step 113: 96992 + 866 = 97858
Step 114: 97858 + 866 = 98724
Step 115: 98724 + 866 = 99590
Step 116: 99590 + 866 = 100456
Step 117: 100456 + 866 = 101322
Step 118: 101322 + 866 = 102188
Step 119: 102188 + 866 = 103054
Step 120: 103054 + 866 = 103920
Step 121: 103920 + 866 = 104786
Step 122: 104786 + 866 = 105652
Step 123: 105652 + 866 = 106518
Step 124: 106518 + 866 = 107384
Step 125: 107384 + 866 = 108250
Step 126: 108250 + 866 = 109116
Step 127: 109116 + 866 = 109982
Step 128: 109982 + 866 = 110848
Step 129: 110848 + 866 = 111714
Step 130: 111714 + 866 = 112580
Step 131: 112580 + 866 = 113446
Step 132: 113446 + 866 = 114312
Step 133: 114312 + 866 = 115178
Step 134: 115178 + 866 = 116044
Step 135: 116044 + 866 = 116910
Step 136: 116910 + 866 = 117776
Step 137: 117776 + 866 = 118642
Step 138: 118642 + 866 = 119508
Step 139: 119508 + 866 = 120374
Step 140: 120374 + 866 = 121240
Step 141: 121240 + 866 = 122106
Step 142: 122106 + 866 = 122972
Step 143: 122972 + 866 = 123838
Step 144: 123838 + 866 = 124704
Step 145: 124704 + 866 = 125570
Step 146: 125570 + 866 = 126436
Step 147: 126436 + 866 = 127302
Step 148: 127302 + 866 = 128168
Step 149: 128168 + 866 = 129034
Step 150: 129034 + 866 = 129900
Step 151: 129900 + 866 = 130766
Step 152: 130766 + 866 = 131632
Step 153: 131632 + 866 = 132498
Step 154: 132498 + 866 = 133364
Step 155: 133364 + 866 = 134230
Step 156: 134230 + 866 = 135096
Step 157: 135096 + 866 = 135962
Step 158: 135962 + 866 = 136828
Step 159: 136828 + 866 = 137694
Step 160: 137694 + 866 = 138560
Step 161: 138560 + 866 = 139426
Step 162: 139426 + 866 = 140292
Step 163: 140292 + 866 = 141158
Step 164: 141158 + 866 = 142024
Step 165: 142024 + 866 = 142890
Step 166: 142890 + 866 = 143756
Step 167: 143756 + 866 = 144622
Step 168: 144622 + 866 = 145488
Step 169: 145488 + 866 = 146354
Step 170: 146354 + 866 = 147220
Step 171: 147220 + 866 = 148086
Step 172: 148086 + 866 = 148952
Step 173: 148952 + 866 = 149818
Step 174: 149818 + 866 = 150684
Step 175: 150684 + 866 = 151550
Step 176: 151550 + 866 = 152416
Step 177: 152416 + 866 = 153282
Step 178: 153282 + 866 = 154148
Step 179: 154148 + 866 = 155014
Step 180: 155014 + 866 = 155880
Step 181: 155880 + 866 = 156746
Step 182: 156746 + 866 = 157612
Step 183: 157612 + 866 = 158478
Step 184: 158478 + 866 = 159344
Step 185: 159344 + 866 = 160210
Step 186: 160210 + 866 = 161076
Step 187: 161076 + 866 = 161942
Step 188: 161942 + 866 = 162808
Step 189: 162808 + 866 = 163674
Step 190: 163674 + 866 = 164540
Step 191: 164540 + 866 = 165406
Step 192: 165406 + 866 = 166272
Step 193: 166272 + 866 = 167138
Step 194: 167138 + 866 = 168004
Step 195: 168004 + 866 = 168870
Step 196: 168870 + 866 = 169736
Step 197: 169736 + 866 = 170602
Step 198: 170602 + 866 = 171468
Step 199: 171468 + 866 = 172334
Step 200: 172334 + 866 = 173200
Step 201: 173200 + 866 = 174066
Step 202: 174066 + 866 = 174932
Step 203: 174932 + 866 = 175798
Step 204: 175798 + 866 = 176664
Step 205: 176664 + 866 = 177530
Step 206: 177530 + 866 = 178396
Step 207: 178396 + 866 = 179262
Step 208: 179262 + 866 = 180128
Step 209: 180128 + 866 = 180994
Step 210: 180994 + 866 = 181860
Step 211: 181860 + 866 = 182726
Step 212: 182726 + 866 = 183592
Step 213: 183592 + 866 = 184458
Step 214: 184458 + 866 = 185324
Step 215: 185324 + 866 = 186190
Step 216: 186190 + 866 = 187056
Step 217: 187056 + 866 = 187922
Step 218: 187922 + 866 = 188788
Step 219: 188788 + 866 = 189654
Step 220: 189654 + 866 = 190520
Step 221: 190520 + 866 = 191386
Step 222: 191386 + 866 = 192252
Step 223: 192252 + 866 = 193118
Step 224: 193118 + 866 = 193984
Step 225: 193984 + 866 = 194850
Step 226: 194850 + 866 = 195716
Step 227: 195716 + 866 = 196582
Step 228: 196582 + 866 = 197448
Step 229: 197448 + 866 = 198314
Step 230: 198314 + 866 = 199180
Step 231: 199180 + 866 = 200046
Step 232: 200046 + 866 = 200912
Step 233: 200912 + 866 = 201778
Step 234: 201778 + 866 = 202644
Step 235: 202644 + 866 = 203510
Step 236: 203510 + 866 = 204376
Step 237: 204376 + 866 = 205242
Step 238: 205242 + 866 = 206108
Step 239: 206108 + 866 = 206974
Step 240: 206974 + 866 = 207840
Step 241: 207840 + 866 = 208706
Step 242: 208706 + 866 = 209572
Step 243: 209572 + 866 = 210438
Step 244: 210438 + 866 = 211304
Step 245: 211304 + 866 = 212170
Step 246: 212170 + 866 = 213036
Step 247: 213036 + 866 = 213902
Step 248: 213902 + 866 = 214768
Step 249: 214768 + 866 = 215634
Step 250: 215634 + 866 = 216500
Step 251: 216500 + 866 = 217366
Step 252: 217366 + 866 = 218232
Step 253: 218232 + 866 = 219098
Step 254: 219098 + 866 = 219964
Step 255: 219964 + 866 = 220830
Step 256: 220830 + 866 = 221696
Step 257: 221696 + 866 = 222562
Step 258: 222562 + 866 = 223428
Step 259: 223428 + 866 = 224294
Step 260: 224294 + 866 = 225160
Step 261: 225160 + 866 = 226026
Step 262: 226026 + 866 = 226892
Step 263: 226892 + 866 = 227758
Step 264: 227758 + 866 = 228624
Step 265: 228624 + 866 = 229490
Step 266: 229490 + 866 = 230356
Step 267: 230356 + 866 = 231222
Step 268: 231222 + 866 = 232088
Step 269: 232088 + 866 = 232954
Step 270: 232954 + 866 = 233820
Step 271: 233820 + 866 = 234686
Step 272: 234686 + 866 = 235552
Step 273: 235552 + 866 = 236418
Step 274: 236418 + 866 = 237284
Step 275: 237284 + 866 = 238150
Step 276: 238150 + 866 = 239016
Step 277: 239016 + 866 = 239882
Step 278: 239882 + 866 = 240748
Step 279: 240748 + 866 = 241614
Step 280: 241614 + 866 = 242480
Step 281: 242480 + 866 = 243346
Step 282: 243346 + 866 = 244212
Step 283: 244212 + 866 = 245078
Step 284: 245078 + 866 = 245944
Step 285: 245944 + 866 = 246810
Step 286: 246810 + 866 = 247676
Step 287: 247676 + 866 = 248542
Step 288: 248542 + 866 = 249408
Step 289: 249408 + 866 = 250274
Step 290: 250274 + 866 = 251140
Step 291: 251140 + 866 = 252006
Step 292: 252006 + 866 = 252872
Step 293: 252872 + 866 = 253738
Step 294: 253738 + 866 = 254604
Step 295: 254604 + 866 = 255470
Step 296: 255470 + 866 = 256336
Step 297: 256336 + 866 = 257202
Step 298: 257202 + 866 = 258068
Step 299: 258068 + 866 = 258934
Step 300: 258934 + 866 = 259800
Step 301: 259800 + 866 = 260666
Step 302: 260666 + 866 = 261532
Step 303: 261532 + 866 = 262398
Step 304: 262398 + 866 = 263264
Step 305: 263264 + 866 = 264130
Step 306: 264130 + 866 = 264996
Step 307: 264996 + 866 = 265862
Step 308: 265862 + 866 = 266728
Step 309: 266728 + 866 = 267594
Step 310: 267594 + 866 = 268460
Step 311: 268460 + 866 = 269326
Step 312: 269326 + 866 = 270192
Step 313: 270192 + 866 = 271058
Step 314: 271058 + 866 = 271924
Step 315: 271924 + 866 = 272790
Step 316: 272790 + 866 = 273656
Step 317: 273656 + 866 = 274522
Step 318: 274522 + 866 = 275388
Step 319: 275388 + 866 = 276254
Step 320: 276254 + 866 = 277120
Step 321: 277120 + 866 = 277986
Step 322: 277986 + 866 = 278852
Step 323: 278852 + 866 = 279718
Step 324: 279718 + 866 = 280584
Step 325: 280584 + 866 = 281450
Step 326: 281450 + 866 = 282316
Step 327: 282316 + 866 = 283182
Step 328: 283182 + 866 = 284048
Step 329: 284048 + 866 = 284914
Step 330: 284914 + 866 = 285780
Step 331: 285780 + 866 = 286646
Step 332: 286646 + 866 = 287512
Step 333: 287512 + 866 = 288378
Step 334: 288378 + 866 = 289244
Step 335: 289244 + 866 = 290110
Step 336: 290110 + 866 = 290976
Step 337: 290976 + 866 = 291842
Step 338: 291842 + 866 = 292708
Step 339: 292708 + 866 = 293574
Step 340: 293574 + 866 = 294440
Step 341: 294440 + 866 = 295306
Step 342: 295306 + 866 = 296172
Step 343: 296172 + 866 = 297038
Step 344: 297038 + 866 = 297904

So, 866*344 = 297904