Alright, let's solve this math problem step by step. First, we have the number 807. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 315. So, we're going to take the number 807 and add it to itself 315 times.
Step 1: 0 + 807 = 807
Step 2: 807 + 807 = 1614
Step 3: 1614 + 807 = 2421
Step 4: 2421 + 807 = 3228
Step 5: 3228 + 807 = 4035
Step 6: 4035 + 807 = 4842
Step 7: 4842 + 807 = 5649
Step 8: 5649 + 807 = 6456
Step 9: 6456 + 807 = 7263
Step 10: 7263 + 807 = 8070
Step 11: 8070 + 807 = 8877
Step 12: 8877 + 807 = 9684
Step 13: 9684 + 807 = 10491
Step 14: 10491 + 807 = 11298
Step 15: 11298 + 807 = 12105
Step 16: 12105 + 807 = 12912
Step 17: 12912 + 807 = 13719
Step 18: 13719 + 807 = 14526
Step 19: 14526 + 807 = 15333
Step 20: 15333 + 807 = 16140
Step 21: 16140 + 807 = 16947
Step 22: 16947 + 807 = 17754
Step 23: 17754 + 807 = 18561
Step 24: 18561 + 807 = 19368
Step 25: 19368 + 807 = 20175
Step 26: 20175 + 807 = 20982
Step 27: 20982 + 807 = 21789
Step 28: 21789 + 807 = 22596
Step 29: 22596 + 807 = 23403
Step 30: 23403 + 807 = 24210
Step 31: 24210 + 807 = 25017
Step 32: 25017 + 807 = 25824
Step 33: 25824 + 807 = 26631
Step 34: 26631 + 807 = 27438
Step 35: 27438 + 807 = 28245
Step 36: 28245 + 807 = 29052
Step 37: 29052 + 807 = 29859
Step 38: 29859 + 807 = 30666
Step 39: 30666 + 807 = 31473
Step 40: 31473 + 807 = 32280
Step 41: 32280 + 807 = 33087
Step 42: 33087 + 807 = 33894
Step 43: 33894 + 807 = 34701
Step 44: 34701 + 807 = 35508
Step 45: 35508 + 807 = 36315
Step 46: 36315 + 807 = 37122
Step 47: 37122 + 807 = 37929
Step 48: 37929 + 807 = 38736
Step 49: 38736 + 807 = 39543
Step 50: 39543 + 807 = 40350
Step 51: 40350 + 807 = 41157
Step 52: 41157 + 807 = 41964
Step 53: 41964 + 807 = 42771
Step 54: 42771 + 807 = 43578
Step 55: 43578 + 807 = 44385
Step 56: 44385 + 807 = 45192
Step 57: 45192 + 807 = 45999
Step 58: 45999 + 807 = 46806
Step 59: 46806 + 807 = 47613
Step 60: 47613 + 807 = 48420
Step 61: 48420 + 807 = 49227
Step 62: 49227 + 807 = 50034
Step 63: 50034 + 807 = 50841
Step 64: 50841 + 807 = 51648
Step 65: 51648 + 807 = 52455
Step 66: 52455 + 807 = 53262
Step 67: 53262 + 807 = 54069
Step 68: 54069 + 807 = 54876
Step 69: 54876 + 807 = 55683
Step 70: 55683 + 807 = 56490
Step 71: 56490 + 807 = 57297
Step 72: 57297 + 807 = 58104
Step 73: 58104 + 807 = 58911
Step 74: 58911 + 807 = 59718
Step 75: 59718 + 807 = 60525
Step 76: 60525 + 807 = 61332
Step 77: 61332 + 807 = 62139
Step 78: 62139 + 807 = 62946
Step 79: 62946 + 807 = 63753
Step 80: 63753 + 807 = 64560
Step 81: 64560 + 807 = 65367
Step 82: 65367 + 807 = 66174
Step 83: 66174 + 807 = 66981
Step 84: 66981 + 807 = 67788
Step 85: 67788 + 807 = 68595
Step 86: 68595 + 807 = 69402
Step 87: 69402 + 807 = 70209
Step 88: 70209 + 807 = 71016
Step 89: 71016 + 807 = 71823
Step 90: 71823 + 807 = 72630
Step 91: 72630 + 807 = 73437
Step 92: 73437 + 807 = 74244
Step 93: 74244 + 807 = 75051
Step 94: 75051 + 807 = 75858
Step 95: 75858 + 807 = 76665
Step 96: 76665 + 807 = 77472
Step 97: 77472 + 807 = 78279
Step 98: 78279 + 807 = 79086
Step 99: 79086 + 807 = 79893
Step 100: 79893 + 807 = 80700
Step 101: 80700 + 807 = 81507
Step 102: 81507 + 807 = 82314
Step 103: 82314 + 807 = 83121
Step 104: 83121 + 807 = 83928
Step 105: 83928 + 807 = 84735
Step 106: 84735 + 807 = 85542
Step 107: 85542 + 807 = 86349
Step 108: 86349 + 807 = 87156
Step 109: 87156 + 807 = 87963
Step 110: 87963 + 807 = 88770
Step 111: 88770 + 807 = 89577
Step 112: 89577 + 807 = 90384
Step 113: 90384 + 807 = 91191
Step 114: 91191 + 807 = 91998
Step 115: 91998 + 807 = 92805
Step 116: 92805 + 807 = 93612
Step 117: 93612 + 807 = 94419
Step 118: 94419 + 807 = 95226
Step 119: 95226 + 807 = 96033
Step 120: 96033 + 807 = 96840
Step 121: 96840 + 807 = 97647
Step 122: 97647 + 807 = 98454
Step 123: 98454 + 807 = 99261
Step 124: 99261 + 807 = 100068
Step 125: 100068 + 807 = 100875
Step 126: 100875 + 807 = 101682
Step 127: 101682 + 807 = 102489
Step 128: 102489 + 807 = 103296
Step 129: 103296 + 807 = 104103
Step 130: 104103 + 807 = 104910
Step 131: 104910 + 807 = 105717
Step 132: 105717 + 807 = 106524
Step 133: 106524 + 807 = 107331
Step 134: 107331 + 807 = 108138
Step 135: 108138 + 807 = 108945
Step 136: 108945 + 807 = 109752
Step 137: 109752 + 807 = 110559
Step 138: 110559 + 807 = 111366
Step 139: 111366 + 807 = 112173
Step 140: 112173 + 807 = 112980
Step 141: 112980 + 807 = 113787
Step 142: 113787 + 807 = 114594
Step 143: 114594 + 807 = 115401
Step 144: 115401 + 807 = 116208
Step 145: 116208 + 807 = 117015
Step 146: 117015 + 807 = 117822
Step 147: 117822 + 807 = 118629
Step 148: 118629 + 807 = 119436
Step 149: 119436 + 807 = 120243
Step 150: 120243 + 807 = 121050
Step 151: 121050 + 807 = 121857
Step 152: 121857 + 807 = 122664
Step 153: 122664 + 807 = 123471
Step 154: 123471 + 807 = 124278
Step 155: 124278 + 807 = 125085
Step 156: 125085 + 807 = 125892
Step 157: 125892 + 807 = 126699
Step 158: 126699 + 807 = 127506
Step 159: 127506 + 807 = 128313
Step 160: 128313 + 807 = 129120
Step 161: 129120 + 807 = 129927
Step 162: 129927 + 807 = 130734
Step 163: 130734 + 807 = 131541
Step 164: 131541 + 807 = 132348
Step 165: 132348 + 807 = 133155
Step 166: 133155 + 807 = 133962
Step 167: 133962 + 807 = 134769
Step 168: 134769 + 807 = 135576
Step 169: 135576 + 807 = 136383
Step 170: 136383 + 807 = 137190
Step 171: 137190 + 807 = 137997
Step 172: 137997 + 807 = 138804
Step 173: 138804 + 807 = 139611
Step 174: 139611 + 807 = 140418
Step 175: 140418 + 807 = 141225
Step 176: 141225 + 807 = 142032
Step 177: 142032 + 807 = 142839
Step 178: 142839 + 807 = 143646
Step 179: 143646 + 807 = 144453
Step 180: 144453 + 807 = 145260
Step 181: 145260 + 807 = 146067
Step 182: 146067 + 807 = 146874
Step 183: 146874 + 807 = 147681
Step 184: 147681 + 807 = 148488
Step 185: 148488 + 807 = 149295
Step 186: 149295 + 807 = 150102
Step 187: 150102 + 807 = 150909
Step 188: 150909 + 807 = 151716
Step 189: 151716 + 807 = 152523
Step 190: 152523 + 807 = 153330
Step 191: 153330 + 807 = 154137
Step 192: 154137 + 807 = 154944
Step 193: 154944 + 807 = 155751
Step 194: 155751 + 807 = 156558
Step 195: 156558 + 807 = 157365
Step 196: 157365 + 807 = 158172
Step 197: 158172 + 807 = 158979
Step 198: 158979 + 807 = 159786
Step 199: 159786 + 807 = 160593
Step 200: 160593 + 807 = 161400
Step 201: 161400 + 807 = 162207
Step 202: 162207 + 807 = 163014
Step 203: 163014 + 807 = 163821
Step 204: 163821 + 807 = 164628
Step 205: 164628 + 807 = 165435
Step 206: 165435 + 807 = 166242
Step 207: 166242 + 807 = 167049
Step 208: 167049 + 807 = 167856
Step 209: 167856 + 807 = 168663
Step 210: 168663 + 807 = 169470
Step 211: 169470 + 807 = 170277
Step 212: 170277 + 807 = 171084
Step 213: 171084 + 807 = 171891
Step 214: 171891 + 807 = 172698
Step 215: 172698 + 807 = 173505
Step 216: 173505 + 807 = 174312
Step 217: 174312 + 807 = 175119
Step 218: 175119 + 807 = 175926
Step 219: 175926 + 807 = 176733
Step 220: 176733 + 807 = 177540
Step 221: 177540 + 807 = 178347
Step 222: 178347 + 807 = 179154
Step 223: 179154 + 807 = 179961
Step 224: 179961 + 807 = 180768
Step 225: 180768 + 807 = 181575
Step 226: 181575 + 807 = 182382
Step 227: 182382 + 807 = 183189
Step 228: 183189 + 807 = 183996
Step 229: 183996 + 807 = 184803
Step 230: 184803 + 807 = 185610
Step 231: 185610 + 807 = 186417
Step 232: 186417 + 807 = 187224
Step 233: 187224 + 807 = 188031
Step 234: 188031 + 807 = 188838
Step 235: 188838 + 807 = 189645
Step 236: 189645 + 807 = 190452
Step 237: 190452 + 807 = 191259
Step 238: 191259 + 807 = 192066
Step 239: 192066 + 807 = 192873
Step 240: 192873 + 807 = 193680
Step 241: 193680 + 807 = 194487
Step 242: 194487 + 807 = 195294
Step 243: 195294 + 807 = 196101
Step 244: 196101 + 807 = 196908
Step 245: 196908 + 807 = 197715
Step 246: 197715 + 807 = 198522
Step 247: 198522 + 807 = 199329
Step 248: 199329 + 807 = 200136
Step 249: 200136 + 807 = 200943
Step 250: 200943 + 807 = 201750
Step 251: 201750 + 807 = 202557
Step 252: 202557 + 807 = 203364
Step 253: 203364 + 807 = 204171
Step 254: 204171 + 807 = 204978
Step 255: 204978 + 807 = 205785
Step 256: 205785 + 807 = 206592
Step 257: 206592 + 807 = 207399
Step 258: 207399 + 807 = 208206
Step 259: 208206 + 807 = 209013
Step 260: 209013 + 807 = 209820
Step 261: 209820 + 807 = 210627
Step 262: 210627 + 807 = 211434
Step 263: 211434 + 807 = 212241
Step 264: 212241 + 807 = 213048
Step 265: 213048 + 807 = 213855
Step 266: 213855 + 807 = 214662
Step 267: 214662 + 807 = 215469
Step 268: 215469 + 807 = 216276
Step 269: 216276 + 807 = 217083
Step 270: 217083 + 807 = 217890
Step 271: 217890 + 807 = 218697
Step 272: 218697 + 807 = 219504
Step 273: 219504 + 807 = 220311
Step 274: 220311 + 807 = 221118
Step 275: 221118 + 807 = 221925
Step 276: 221925 + 807 = 222732
Step 277: 222732 + 807 = 223539
Step 278: 223539 + 807 = 224346
Step 279: 224346 + 807 = 225153
Step 280: 225153 + 807 = 225960
Step 281: 225960 + 807 = 226767
Step 282: 226767 + 807 = 227574
Step 283: 227574 + 807 = 228381
Step 284: 228381 + 807 = 229188
Step 285: 229188 + 807 = 229995
Step 286: 229995 + 807 = 230802
Step 287: 230802 + 807 = 231609
Step 288: 231609 + 807 = 232416
Step 289: 232416 + 807 = 233223
Step 290: 233223 + 807 = 234030
Step 291: 234030 + 807 = 234837
Step 292: 234837 + 807 = 235644
Step 293: 235644 + 807 = 236451
Step 294: 236451 + 807 = 237258
Step 295: 237258 + 807 = 238065
Step 296: 238065 + 807 = 238872
Step 297: 238872 + 807 = 239679
Step 298: 239679 + 807 = 240486
Step 299: 240486 + 807 = 241293
Step 300: 241293 + 807 = 242100
Step 301: 242100 + 807 = 242907
Step 302: 242907 + 807 = 243714
Step 303: 243714 + 807 = 244521
Step 304: 244521 + 807 = 245328
Step 305: 245328 + 807 = 246135
Step 306: 246135 + 807 = 246942
Step 307: 246942 + 807 = 247749
Step 308: 247749 + 807 = 248556
Step 309: 248556 + 807 = 249363
Step 310: 249363 + 807 = 250170
Step 311: 250170 + 807 = 250977
Step 312: 250977 + 807 = 251784
Step 313: 251784 + 807 = 252591
Step 314: 252591 + 807 = 253398
Step 315: 253398 + 807 = 254205

So, 807*315 = 254205