Alright, let's solve this math problem step by step. First, we have the number 257. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 313. So, we're going to take the number 257 and add it to itself 313 times.
Step 1: 0 + 257 = 257
Step 2: 257 + 257 = 514
Step 3: 514 + 257 = 771
Step 4: 771 + 257 = 1028
Step 5: 1028 + 257 = 1285
Step 6: 1285 + 257 = 1542
Step 7: 1542 + 257 = 1799
Step 8: 1799 + 257 = 2056
Step 9: 2056 + 257 = 2313
Step 10: 2313 + 257 = 2570
Step 11: 2570 + 257 = 2827
Step 12: 2827 + 257 = 3084
Step 13: 3084 + 257 = 3341
Step 14: 3341 + 257 = 3598
Step 15: 3598 + 257 = 3855
Step 16: 3855 + 257 = 4112
Step 17: 4112 + 257 = 4369
Step 18: 4369 + 257 = 4626
Step 19: 4626 + 257 = 4883
Step 20: 4883 + 257 = 5140
Step 21: 5140 + 257 = 5397
Step 22: 5397 + 257 = 5654
Step 23: 5654 + 257 = 5911
Step 24: 5911 + 257 = 6168
Step 25: 6168 + 257 = 6425
Step 26: 6425 + 257 = 6682
Step 27: 6682 + 257 = 6939
Step 28: 6939 + 257 = 7196
Step 29: 7196 + 257 = 7453
Step 30: 7453 + 257 = 7710
Step 31: 7710 + 257 = 7967
Step 32: 7967 + 257 = 8224
Step 33: 8224 + 257 = 8481
Step 34: 8481 + 257 = 8738
Step 35: 8738 + 257 = 8995
Step 36: 8995 + 257 = 9252
Step 37: 9252 + 257 = 9509
Step 38: 9509 + 257 = 9766
Step 39: 9766 + 257 = 10023
Step 40: 10023 + 257 = 10280
Step 41: 10280 + 257 = 10537
Step 42: 10537 + 257 = 10794
Step 43: 10794 + 257 = 11051
Step 44: 11051 + 257 = 11308
Step 45: 11308 + 257 = 11565
Step 46: 11565 + 257 = 11822
Step 47: 11822 + 257 = 12079
Step 48: 12079 + 257 = 12336
Step 49: 12336 + 257 = 12593
Step 50: 12593 + 257 = 12850
Step 51: 12850 + 257 = 13107
Step 52: 13107 + 257 = 13364
Step 53: 13364 + 257 = 13621
Step 54: 13621 + 257 = 13878
Step 55: 13878 + 257 = 14135
Step 56: 14135 + 257 = 14392
Step 57: 14392 + 257 = 14649
Step 58: 14649 + 257 = 14906
Step 59: 14906 + 257 = 15163
Step 60: 15163 + 257 = 15420
Step 61: 15420 + 257 = 15677
Step 62: 15677 + 257 = 15934
Step 63: 15934 + 257 = 16191
Step 64: 16191 + 257 = 16448
Step 65: 16448 + 257 = 16705
Step 66: 16705 + 257 = 16962
Step 67: 16962 + 257 = 17219
Step 68: 17219 + 257 = 17476
Step 69: 17476 + 257 = 17733
Step 70: 17733 + 257 = 17990
Step 71: 17990 + 257 = 18247
Step 72: 18247 + 257 = 18504
Step 73: 18504 + 257 = 18761
Step 74: 18761 + 257 = 19018
Step 75: 19018 + 257 = 19275
Step 76: 19275 + 257 = 19532
Step 77: 19532 + 257 = 19789
Step 78: 19789 + 257 = 20046
Step 79: 20046 + 257 = 20303
Step 80: 20303 + 257 = 20560
Step 81: 20560 + 257 = 20817
Step 82: 20817 + 257 = 21074
Step 83: 21074 + 257 = 21331
Step 84: 21331 + 257 = 21588
Step 85: 21588 + 257 = 21845
Step 86: 21845 + 257 = 22102
Step 87: 22102 + 257 = 22359
Step 88: 22359 + 257 = 22616
Step 89: 22616 + 257 = 22873
Step 90: 22873 + 257 = 23130
Step 91: 23130 + 257 = 23387
Step 92: 23387 + 257 = 23644
Step 93: 23644 + 257 = 23901
Step 94: 23901 + 257 = 24158
Step 95: 24158 + 257 = 24415
Step 96: 24415 + 257 = 24672
Step 97: 24672 + 257 = 24929
Step 98: 24929 + 257 = 25186
Step 99: 25186 + 257 = 25443
Step 100: 25443 + 257 = 25700
Step 101: 25700 + 257 = 25957
Step 102: 25957 + 257 = 26214
Step 103: 26214 + 257 = 26471
Step 104: 26471 + 257 = 26728
Step 105: 26728 + 257 = 26985
Step 106: 26985 + 257 = 27242
Step 107: 27242 + 257 = 27499
Step 108: 27499 + 257 = 27756
Step 109: 27756 + 257 = 28013
Step 110: 28013 + 257 = 28270
Step 111: 28270 + 257 = 28527
Step 112: 28527 + 257 = 28784
Step 113: 28784 + 257 = 29041
Step 114: 29041 + 257 = 29298
Step 115: 29298 + 257 = 29555
Step 116: 29555 + 257 = 29812
Step 117: 29812 + 257 = 30069
Step 118: 30069 + 257 = 30326
Step 119: 30326 + 257 = 30583
Step 120: 30583 + 257 = 30840
Step 121: 30840 + 257 = 31097
Step 122: 31097 + 257 = 31354
Step 123: 31354 + 257 = 31611
Step 124: 31611 + 257 = 31868
Step 125: 31868 + 257 = 32125
Step 126: 32125 + 257 = 32382
Step 127: 32382 + 257 = 32639
Step 128: 32639 + 257 = 32896
Step 129: 32896 + 257 = 33153
Step 130: 33153 + 257 = 33410
Step 131: 33410 + 257 = 33667
Step 132: 33667 + 257 = 33924
Step 133: 33924 + 257 = 34181
Step 134: 34181 + 257 = 34438
Step 135: 34438 + 257 = 34695
Step 136: 34695 + 257 = 34952
Step 137: 34952 + 257 = 35209
Step 138: 35209 + 257 = 35466
Step 139: 35466 + 257 = 35723
Step 140: 35723 + 257 = 35980
Step 141: 35980 + 257 = 36237
Step 142: 36237 + 257 = 36494
Step 143: 36494 + 257 = 36751
Step 144: 36751 + 257 = 37008
Step 145: 37008 + 257 = 37265
Step 146: 37265 + 257 = 37522
Step 147: 37522 + 257 = 37779
Step 148: 37779 + 257 = 38036
Step 149: 38036 + 257 = 38293
Step 150: 38293 + 257 = 38550
Step 151: 38550 + 257 = 38807
Step 152: 38807 + 257 = 39064
Step 153: 39064 + 257 = 39321
Step 154: 39321 + 257 = 39578
Step 155: 39578 + 257 = 39835
Step 156: 39835 + 257 = 40092
Step 157: 40092 + 257 = 40349
Step 158: 40349 + 257 = 40606
Step 159: 40606 + 257 = 40863
Step 160: 40863 + 257 = 41120
Step 161: 41120 + 257 = 41377
Step 162: 41377 + 257 = 41634
Step 163: 41634 + 257 = 41891
Step 164: 41891 + 257 = 42148
Step 165: 42148 + 257 = 42405
Step 166: 42405 + 257 = 42662
Step 167: 42662 + 257 = 42919
Step 168: 42919 + 257 = 43176
Step 169: 43176 + 257 = 43433
Step 170: 43433 + 257 = 43690
Step 171: 43690 + 257 = 43947
Step 172: 43947 + 257 = 44204
Step 173: 44204 + 257 = 44461
Step 174: 44461 + 257 = 44718
Step 175: 44718 + 257 = 44975
Step 176: 44975 + 257 = 45232
Step 177: 45232 + 257 = 45489
Step 178: 45489 + 257 = 45746
Step 179: 45746 + 257 = 46003
Step 180: 46003 + 257 = 46260
Step 181: 46260 + 257 = 46517
Step 182: 46517 + 257 = 46774
Step 183: 46774 + 257 = 47031
Step 184: 47031 + 257 = 47288
Step 185: 47288 + 257 = 47545
Step 186: 47545 + 257 = 47802
Step 187: 47802 + 257 = 48059
Step 188: 48059 + 257 = 48316
Step 189: 48316 + 257 = 48573
Step 190: 48573 + 257 = 48830
Step 191: 48830 + 257 = 49087
Step 192: 49087 + 257 = 49344
Step 193: 49344 + 257 = 49601
Step 194: 49601 + 257 = 49858
Step 195: 49858 + 257 = 50115
Step 196: 50115 + 257 = 50372
Step 197: 50372 + 257 = 50629
Step 198: 50629 + 257 = 50886
Step 199: 50886 + 257 = 51143
Step 200: 51143 + 257 = 51400
Step 201: 51400 + 257 = 51657
Step 202: 51657 + 257 = 51914
Step 203: 51914 + 257 = 52171
Step 204: 52171 + 257 = 52428
Step 205: 52428 + 257 = 52685
Step 206: 52685 + 257 = 52942
Step 207: 52942 + 257 = 53199
Step 208: 53199 + 257 = 53456
Step 209: 53456 + 257 = 53713
Step 210: 53713 + 257 = 53970
Step 211: 53970 + 257 = 54227
Step 212: 54227 + 257 = 54484
Step 213: 54484 + 257 = 54741
Step 214: 54741 + 257 = 54998
Step 215: 54998 + 257 = 55255
Step 216: 55255 + 257 = 55512
Step 217: 55512 + 257 = 55769
Step 218: 55769 + 257 = 56026
Step 219: 56026 + 257 = 56283
Step 220: 56283 + 257 = 56540
Step 221: 56540 + 257 = 56797
Step 222: 56797 + 257 = 57054
Step 223: 57054 + 257 = 57311
Step 224: 57311 + 257 = 57568
Step 225: 57568 + 257 = 57825
Step 226: 57825 + 257 = 58082
Step 227: 58082 + 257 = 58339
Step 228: 58339 + 257 = 58596
Step 229: 58596 + 257 = 58853
Step 230: 58853 + 257 = 59110
Step 231: 59110 + 257 = 59367
Step 232: 59367 + 257 = 59624
Step 233: 59624 + 257 = 59881
Step 234: 59881 + 257 = 60138
Step 235: 60138 + 257 = 60395
Step 236: 60395 + 257 = 60652
Step 237: 60652 + 257 = 60909
Step 238: 60909 + 257 = 61166
Step 239: 61166 + 257 = 61423
Step 240: 61423 + 257 = 61680
Step 241: 61680 + 257 = 61937
Step 242: 61937 + 257 = 62194
Step 243: 62194 + 257 = 62451
Step 244: 62451 + 257 = 62708
Step 245: 62708 + 257 = 62965
Step 246: 62965 + 257 = 63222
Step 247: 63222 + 257 = 63479
Step 248: 63479 + 257 = 63736
Step 249: 63736 + 257 = 63993
Step 250: 63993 + 257 = 64250
Step 251: 64250 + 257 = 64507
Step 252: 64507 + 257 = 64764
Step 253: 64764 + 257 = 65021
Step 254: 65021 + 257 = 65278
Step 255: 65278 + 257 = 65535
Step 256: 65535 + 257 = 65792
Step 257: 65792 + 257 = 66049
Step 258: 66049 + 257 = 66306
Step 259: 66306 + 257 = 66563
Step 260: 66563 + 257 = 66820
Step 261: 66820 + 257 = 67077
Step 262: 67077 + 257 = 67334
Step 263: 67334 + 257 = 67591
Step 264: 67591 + 257 = 67848
Step 265: 67848 + 257 = 68105
Step 266: 68105 + 257 = 68362
Step 267: 68362 + 257 = 68619
Step 268: 68619 + 257 = 68876
Step 269: 68876 + 257 = 69133
Step 270: 69133 + 257 = 69390
Step 271: 69390 + 257 = 69647
Step 272: 69647 + 257 = 69904
Step 273: 69904 + 257 = 70161
Step 274: 70161 + 257 = 70418
Step 275: 70418 + 257 = 70675
Step 276: 70675 + 257 = 70932
Step 277: 70932 + 257 = 71189
Step 278: 71189 + 257 = 71446
Step 279: 71446 + 257 = 71703
Step 280: 71703 + 257 = 71960
Step 281: 71960 + 257 = 72217
Step 282: 72217 + 257 = 72474
Step 283: 72474 + 257 = 72731
Step 284: 72731 + 257 = 72988
Step 285: 72988 + 257 = 73245
Step 286: 73245 + 257 = 73502
Step 287: 73502 + 257 = 73759
Step 288: 73759 + 257 = 74016
Step 289: 74016 + 257 = 74273
Step 290: 74273 + 257 = 74530
Step 291: 74530 + 257 = 74787
Step 292: 74787 + 257 = 75044
Step 293: 75044 + 257 = 75301
Step 294: 75301 + 257 = 75558
Step 295: 75558 + 257 = 75815
Step 296: 75815 + 257 = 76072
Step 297: 76072 + 257 = 76329
Step 298: 76329 + 257 = 76586
Step 299: 76586 + 257 = 76843
Step 300: 76843 + 257 = 77100
Step 301: 77100 + 257 = 77357
Step 302: 77357 + 257 = 77614
Step 303: 77614 + 257 = 77871
Step 304: 77871 + 257 = 78128
Step 305: 78128 + 257 = 78385
Step 306: 78385 + 257 = 78642
Step 307: 78642 + 257 = 78899
Step 308: 78899 + 257 = 79156
Step 309: 79156 + 257 = 79413
Step 310: 79413 + 257 = 79670
Step 311: 79670 + 257 = 79927
Step 312: 79927 + 257 = 80184
Step 313: 80184 + 257 = 80441

So, 257*313 = 80441