Alright, let's solve this math problem step by step. First, we have the number 853. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 427. So, we're going to take the number 853 and add it to itself 427 times.
Step 1: 0 + 853 = 853
Step 2: 853 + 853 = 1706
Step 3: 1706 + 853 = 2559
Step 4: 2559 + 853 = 3412
Step 5: 3412 + 853 = 4265
Step 6: 4265 + 853 = 5118
Step 7: 5118 + 853 = 5971
Step 8: 5971 + 853 = 6824
Step 9: 6824 + 853 = 7677
Step 10: 7677 + 853 = 8530
Step 11: 8530 + 853 = 9383
Step 12: 9383 + 853 = 10236
Step 13: 10236 + 853 = 11089
Step 14: 11089 + 853 = 11942
Step 15: 11942 + 853 = 12795
Step 16: 12795 + 853 = 13648
Step 17: 13648 + 853 = 14501
Step 18: 14501 + 853 = 15354
Step 19: 15354 + 853 = 16207
Step 20: 16207 + 853 = 17060
Step 21: 17060 + 853 = 17913
Step 22: 17913 + 853 = 18766
Step 23: 18766 + 853 = 19619
Step 24: 19619 + 853 = 20472
Step 25: 20472 + 853 = 21325
Step 26: 21325 + 853 = 22178
Step 27: 22178 + 853 = 23031
Step 28: 23031 + 853 = 23884
Step 29: 23884 + 853 = 24737
Step 30: 24737 + 853 = 25590
Step 31: 25590 + 853 = 26443
Step 32: 26443 + 853 = 27296
Step 33: 27296 + 853 = 28149
Step 34: 28149 + 853 = 29002
Step 35: 29002 + 853 = 29855
Step 36: 29855 + 853 = 30708
Step 37: 30708 + 853 = 31561
Step 38: 31561 + 853 = 32414
Step 39: 32414 + 853 = 33267
Step 40: 33267 + 853 = 34120
Step 41: 34120 + 853 = 34973
Step 42: 34973 + 853 = 35826
Step 43: 35826 + 853 = 36679
Step 44: 36679 + 853 = 37532
Step 45: 37532 + 853 = 38385
Step 46: 38385 + 853 = 39238
Step 47: 39238 + 853 = 40091
Step 48: 40091 + 853 = 40944
Step 49: 40944 + 853 = 41797
Step 50: 41797 + 853 = 42650
Step 51: 42650 + 853 = 43503
Step 52: 43503 + 853 = 44356
Step 53: 44356 + 853 = 45209
Step 54: 45209 + 853 = 46062
Step 55: 46062 + 853 = 46915
Step 56: 46915 + 853 = 47768
Step 57: 47768 + 853 = 48621
Step 58: 48621 + 853 = 49474
Step 59: 49474 + 853 = 50327
Step 60: 50327 + 853 = 51180
Step 61: 51180 + 853 = 52033
Step 62: 52033 + 853 = 52886
Step 63: 52886 + 853 = 53739
Step 64: 53739 + 853 = 54592
Step 65: 54592 + 853 = 55445
Step 66: 55445 + 853 = 56298
Step 67: 56298 + 853 = 57151
Step 68: 57151 + 853 = 58004
Step 69: 58004 + 853 = 58857
Step 70: 58857 + 853 = 59710
Step 71: 59710 + 853 = 60563
Step 72: 60563 + 853 = 61416
Step 73: 61416 + 853 = 62269
Step 74: 62269 + 853 = 63122
Step 75: 63122 + 853 = 63975
Step 76: 63975 + 853 = 64828
Step 77: 64828 + 853 = 65681
Step 78: 65681 + 853 = 66534
Step 79: 66534 + 853 = 67387
Step 80: 67387 + 853 = 68240
Step 81: 68240 + 853 = 69093
Step 82: 69093 + 853 = 69946
Step 83: 69946 + 853 = 70799
Step 84: 70799 + 853 = 71652
Step 85: 71652 + 853 = 72505
Step 86: 72505 + 853 = 73358
Step 87: 73358 + 853 = 74211
Step 88: 74211 + 853 = 75064
Step 89: 75064 + 853 = 75917
Step 90: 75917 + 853 = 76770
Step 91: 76770 + 853 = 77623
Step 92: 77623 + 853 = 78476
Step 93: 78476 + 853 = 79329
Step 94: 79329 + 853 = 80182
Step 95: 80182 + 853 = 81035
Step 96: 81035 + 853 = 81888
Step 97: 81888 + 853 = 82741
Step 98: 82741 + 853 = 83594
Step 99: 83594 + 853 = 84447
Step 100: 84447 + 853 = 85300
Step 101: 85300 + 853 = 86153
Step 102: 86153 + 853 = 87006
Step 103: 87006 + 853 = 87859
Step 104: 87859 + 853 = 88712
Step 105: 88712 + 853 = 89565
Step 106: 89565 + 853 = 90418
Step 107: 90418 + 853 = 91271
Step 108: 91271 + 853 = 92124
Step 109: 92124 + 853 = 92977
Step 110: 92977 + 853 = 93830
Step 111: 93830 + 853 = 94683
Step 112: 94683 + 853 = 95536
Step 113: 95536 + 853 = 96389
Step 114: 96389 + 853 = 97242
Step 115: 97242 + 853 = 98095
Step 116: 98095 + 853 = 98948
Step 117: 98948 + 853 = 99801
Step 118: 99801 + 853 = 100654
Step 119: 100654 + 853 = 101507
Step 120: 101507 + 853 = 102360
Step 121: 102360 + 853 = 103213
Step 122: 103213 + 853 = 104066
Step 123: 104066 + 853 = 104919
Step 124: 104919 + 853 = 105772
Step 125: 105772 + 853 = 106625
Step 126: 106625 + 853 = 107478
Step 127: 107478 + 853 = 108331
Step 128: 108331 + 853 = 109184
Step 129: 109184 + 853 = 110037
Step 130: 110037 + 853 = 110890
Step 131: 110890 + 853 = 111743
Step 132: 111743 + 853 = 112596
Step 133: 112596 + 853 = 113449
Step 134: 113449 + 853 = 114302
Step 135: 114302 + 853 = 115155
Step 136: 115155 + 853 = 116008
Step 137: 116008 + 853 = 116861
Step 138: 116861 + 853 = 117714
Step 139: 117714 + 853 = 118567
Step 140: 118567 + 853 = 119420
Step 141: 119420 + 853 = 120273
Step 142: 120273 + 853 = 121126
Step 143: 121126 + 853 = 121979
Step 144: 121979 + 853 = 122832
Step 145: 122832 + 853 = 123685
Step 146: 123685 + 853 = 124538
Step 147: 124538 + 853 = 125391
Step 148: 125391 + 853 = 126244
Step 149: 126244 + 853 = 127097
Step 150: 127097 + 853 = 127950
Step 151: 127950 + 853 = 128803
Step 152: 128803 + 853 = 129656
Step 153: 129656 + 853 = 130509
Step 154: 130509 + 853 = 131362
Step 155: 131362 + 853 = 132215
Step 156: 132215 + 853 = 133068
Step 157: 133068 + 853 = 133921
Step 158: 133921 + 853 = 134774
Step 159: 134774 + 853 = 135627
Step 160: 135627 + 853 = 136480
Step 161: 136480 + 853 = 137333
Step 162: 137333 + 853 = 138186
Step 163: 138186 + 853 = 139039
Step 164: 139039 + 853 = 139892
Step 165: 139892 + 853 = 140745
Step 166: 140745 + 853 = 141598
Step 167: 141598 + 853 = 142451
Step 168: 142451 + 853 = 143304
Step 169: 143304 + 853 = 144157
Step 170: 144157 + 853 = 145010
Step 171: 145010 + 853 = 145863
Step 172: 145863 + 853 = 146716
Step 173: 146716 + 853 = 147569
Step 174: 147569 + 853 = 148422
Step 175: 148422 + 853 = 149275
Step 176: 149275 + 853 = 150128
Step 177: 150128 + 853 = 150981
Step 178: 150981 + 853 = 151834
Step 179: 151834 + 853 = 152687
Step 180: 152687 + 853 = 153540
Step 181: 153540 + 853 = 154393
Step 182: 154393 + 853 = 155246
Step 183: 155246 + 853 = 156099
Step 184: 156099 + 853 = 156952
Step 185: 156952 + 853 = 157805
Step 186: 157805 + 853 = 158658
Step 187: 158658 + 853 = 159511
Step 188: 159511 + 853 = 160364
Step 189: 160364 + 853 = 161217
Step 190: 161217 + 853 = 162070
Step 191: 162070 + 853 = 162923
Step 192: 162923 + 853 = 163776
Step 193: 163776 + 853 = 164629
Step 194: 164629 + 853 = 165482
Step 195: 165482 + 853 = 166335
Step 196: 166335 + 853 = 167188
Step 197: 167188 + 853 = 168041
Step 198: 168041 + 853 = 168894
Step 199: 168894 + 853 = 169747
Step 200: 169747 + 853 = 170600
Step 201: 170600 + 853 = 171453
Step 202: 171453 + 853 = 172306
Step 203: 172306 + 853 = 173159
Step 204: 173159 + 853 = 174012
Step 205: 174012 + 853 = 174865
Step 206: 174865 + 853 = 175718
Step 207: 175718 + 853 = 176571
Step 208: 176571 + 853 = 177424
Step 209: 177424 + 853 = 178277
Step 210: 178277 + 853 = 179130
Step 211: 179130 + 853 = 179983
Step 212: 179983 + 853 = 180836
Step 213: 180836 + 853 = 181689
Step 214: 181689 + 853 = 182542
Step 215: 182542 + 853 = 183395
Step 216: 183395 + 853 = 184248
Step 217: 184248 + 853 = 185101
Step 218: 185101 + 853 = 185954
Step 219: 185954 + 853 = 186807
Step 220: 186807 + 853 = 187660
Step 221: 187660 + 853 = 188513
Step 222: 188513 + 853 = 189366
Step 223: 189366 + 853 = 190219
Step 224: 190219 + 853 = 191072
Step 225: 191072 + 853 = 191925
Step 226: 191925 + 853 = 192778
Step 227: 192778 + 853 = 193631
Step 228: 193631 + 853 = 194484
Step 229: 194484 + 853 = 195337
Step 230: 195337 + 853 = 196190
Step 231: 196190 + 853 = 197043
Step 232: 197043 + 853 = 197896
Step 233: 197896 + 853 = 198749
Step 234: 198749 + 853 = 199602
Step 235: 199602 + 853 = 200455
Step 236: 200455 + 853 = 201308
Step 237: 201308 + 853 = 202161
Step 238: 202161 + 853 = 203014
Step 239: 203014 + 853 = 203867
Step 240: 203867 + 853 = 204720
Step 241: 204720 + 853 = 205573
Step 242: 205573 + 853 = 206426
Step 243: 206426 + 853 = 207279
Step 244: 207279 + 853 = 208132
Step 245: 208132 + 853 = 208985
Step 246: 208985 + 853 = 209838
Step 247: 209838 + 853 = 210691
Step 248: 210691 + 853 = 211544
Step 249: 211544 + 853 = 212397
Step 250: 212397 + 853 = 213250
Step 251: 213250 + 853 = 214103
Step 252: 214103 + 853 = 214956
Step 253: 214956 + 853 = 215809
Step 254: 215809 + 853 = 216662
Step 255: 216662 + 853 = 217515
Step 256: 217515 + 853 = 218368
Step 257: 218368 + 853 = 219221
Step 258: 219221 + 853 = 220074
Step 259: 220074 + 853 = 220927
Step 260: 220927 + 853 = 221780
Step 261: 221780 + 853 = 222633
Step 262: 222633 + 853 = 223486
Step 263: 223486 + 853 = 224339
Step 264: 224339 + 853 = 225192
Step 265: 225192 + 853 = 226045
Step 266: 226045 + 853 = 226898
Step 267: 226898 + 853 = 227751
Step 268: 227751 + 853 = 228604
Step 269: 228604 + 853 = 229457
Step 270: 229457 + 853 = 230310
Step 271: 230310 + 853 = 231163
Step 272: 231163 + 853 = 232016
Step 273: 232016 + 853 = 232869
Step 274: 232869 + 853 = 233722
Step 275: 233722 + 853 = 234575
Step 276: 234575 + 853 = 235428
Step 277: 235428 + 853 = 236281
Step 278: 236281 + 853 = 237134
Step 279: 237134 + 853 = 237987
Step 280: 237987 + 853 = 238840
Step 281: 238840 + 853 = 239693
Step 282: 239693 + 853 = 240546
Step 283: 240546 + 853 = 241399
Step 284: 241399 + 853 = 242252
Step 285: 242252 + 853 = 243105
Step 286: 243105 + 853 = 243958
Step 287: 243958 + 853 = 244811
Step 288: 244811 + 853 = 245664
Step 289: 245664 + 853 = 246517
Step 290: 246517 + 853 = 247370
Step 291: 247370 + 853 = 248223
Step 292: 248223 + 853 = 249076
Step 293: 249076 + 853 = 249929
Step 294: 249929 + 853 = 250782
Step 295: 250782 + 853 = 251635
Step 296: 251635 + 853 = 252488
Step 297: 252488 + 853 = 253341
Step 298: 253341 + 853 = 254194
Step 299: 254194 + 853 = 255047
Step 300: 255047 + 853 = 255900
Step 301: 255900 + 853 = 256753
Step 302: 256753 + 853 = 257606
Step 303: 257606 + 853 = 258459
Step 304: 258459 + 853 = 259312
Step 305: 259312 + 853 = 260165
Step 306: 260165 + 853 = 261018
Step 307: 261018 + 853 = 261871
Step 308: 261871 + 853 = 262724
Step 309: 262724 + 853 = 263577
Step 310: 263577 + 853 = 264430
Step 311: 264430 + 853 = 265283
Step 312: 265283 + 853 = 266136
Step 313: 266136 + 853 = 266989
Step 314: 266989 + 853 = 267842
Step 315: 267842 + 853 = 268695
Step 316: 268695 + 853 = 269548
Step 317: 269548 + 853 = 270401
Step 318: 270401 + 853 = 271254
Step 319: 271254 + 853 = 272107
Step 320: 272107 + 853 = 272960
Step 321: 272960 + 853 = 273813
Step 322: 273813 + 853 = 274666
Step 323: 274666 + 853 = 275519
Step 324: 275519 + 853 = 276372
Step 325: 276372 + 853 = 277225
Step 326: 277225 + 853 = 278078
Step 327: 278078 + 853 = 278931
Step 328: 278931 + 853 = 279784
Step 329: 279784 + 853 = 280637
Step 330: 280637 + 853 = 281490
Step 331: 281490 + 853 = 282343
Step 332: 282343 + 853 = 283196
Step 333: 283196 + 853 = 284049
Step 334: 284049 + 853 = 284902
Step 335: 284902 + 853 = 285755
Step 336: 285755 + 853 = 286608
Step 337: 286608 + 853 = 287461
Step 338: 287461 + 853 = 288314
Step 339: 288314 + 853 = 289167
Step 340: 289167 + 853 = 290020
Step 341: 290020 + 853 = 290873
Step 342: 290873 + 853 = 291726
Step 343: 291726 + 853 = 292579
Step 344: 292579 + 853 = 293432
Step 345: 293432 + 853 = 294285
Step 346: 294285 + 853 = 295138
Step 347: 295138 + 853 = 295991
Step 348: 295991 + 853 = 296844
Step 349: 296844 + 853 = 297697
Step 350: 297697 + 853 = 298550
Step 351: 298550 + 853 = 299403
Step 352: 299403 + 853 = 300256
Step 353: 300256 + 853 = 301109
Step 354: 301109 + 853 = 301962
Step 355: 301962 + 853 = 302815
Step 356: 302815 + 853 = 303668
Step 357: 303668 + 853 = 304521
Step 358: 304521 + 853 = 305374
Step 359: 305374 + 853 = 306227
Step 360: 306227 + 853 = 307080
Step 361: 307080 + 853 = 307933
Step 362: 307933 + 853 = 308786
Step 363: 308786 + 853 = 309639
Step 364: 309639 + 853 = 310492
Step 365: 310492 + 853 = 311345
Step 366: 311345 + 853 = 312198
Step 367: 312198 + 853 = 313051
Step 368: 313051 + 853 = 313904
Step 369: 313904 + 853 = 314757
Step 370: 314757 + 853 = 315610
Step 371: 315610 + 853 = 316463
Step 372: 316463 + 853 = 317316
Step 373: 317316 + 853 = 318169
Step 374: 318169 + 853 = 319022
Step 375: 319022 + 853 = 319875
Step 376: 319875 + 853 = 320728
Step 377: 320728 + 853 = 321581
Step 378: 321581 + 853 = 322434
Step 379: 322434 + 853 = 323287
Step 380: 323287 + 853 = 324140
Step 381: 324140 + 853 = 324993
Step 382: 324993 + 853 = 325846
Step 383: 325846 + 853 = 326699
Step 384: 326699 + 853 = 327552
Step 385: 327552 + 853 = 328405
Step 386: 328405 + 853 = 329258
Step 387: 329258 + 853 = 330111
Step 388: 330111 + 853 = 330964
Step 389: 330964 + 853 = 331817
Step 390: 331817 + 853 = 332670
Step 391: 332670 + 853 = 333523
Step 392: 333523 + 853 = 334376
Step 393: 334376 + 853 = 335229
Step 394: 335229 + 853 = 336082
Step 395: 336082 + 853 = 336935
Step 396: 336935 + 853 = 337788
Step 397: 337788 + 853 = 338641
Step 398: 338641 + 853 = 339494
Step 399: 339494 + 853 = 340347
Step 400: 340347 + 853 = 341200
Step 401: 341200 + 853 = 342053
Step 402: 342053 + 853 = 342906
Step 403: 342906 + 853 = 343759
Step 404: 343759 + 853 = 344612
Step 405: 344612 + 853 = 345465
Step 406: 345465 + 853 = 346318
Step 407: 346318 + 853 = 347171
Step 408: 347171 + 853 = 348024
Step 409: 348024 + 853 = 348877
Step 410: 348877 + 853 = 349730
Step 411: 349730 + 853 = 350583
Step 412: 350583 + 853 = 351436
Step 413: 351436 + 853 = 352289
Step 414: 352289 + 853 = 353142
Step 415: 353142 + 853 = 353995
Step 416: 353995 + 853 = 354848
Step 417: 354848 + 853 = 355701
Step 418: 355701 + 853 = 356554
Step 419: 356554 + 853 = 357407
Step 420: 357407 + 853 = 358260
Step 421: 358260 + 853 = 359113
Step 422: 359113 + 853 = 359966
Step 423: 359966 + 853 = 360819
Step 424: 360819 + 853 = 361672
Step 425: 361672 + 853 = 362525
Step 426: 362525 + 853 = 363378
Step 427: 363378 + 853 = 364231

So, 853*427 = 364231