Alright, let's solve this math problem step by step. First, we have the number 804. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 310. So, we're going to take the number 804 and add it to itself 310 times.
Step 1: 0 + 804 = 804
Step 2: 804 + 804 = 1608
Step 3: 1608 + 804 = 2412
Step 4: 2412 + 804 = 3216
Step 5: 3216 + 804 = 4020
Step 6: 4020 + 804 = 4824
Step 7: 4824 + 804 = 5628
Step 8: 5628 + 804 = 6432
Step 9: 6432 + 804 = 7236
Step 10: 7236 + 804 = 8040
Step 11: 8040 + 804 = 8844
Step 12: 8844 + 804 = 9648
Step 13: 9648 + 804 = 10452
Step 14: 10452 + 804 = 11256
Step 15: 11256 + 804 = 12060
Step 16: 12060 + 804 = 12864
Step 17: 12864 + 804 = 13668
Step 18: 13668 + 804 = 14472
Step 19: 14472 + 804 = 15276
Step 20: 15276 + 804 = 16080
Step 21: 16080 + 804 = 16884
Step 22: 16884 + 804 = 17688
Step 23: 17688 + 804 = 18492
Step 24: 18492 + 804 = 19296
Step 25: 19296 + 804 = 20100
Step 26: 20100 + 804 = 20904
Step 27: 20904 + 804 = 21708
Step 28: 21708 + 804 = 22512
Step 29: 22512 + 804 = 23316
Step 30: 23316 + 804 = 24120
Step 31: 24120 + 804 = 24924
Step 32: 24924 + 804 = 25728
Step 33: 25728 + 804 = 26532
Step 34: 26532 + 804 = 27336
Step 35: 27336 + 804 = 28140
Step 36: 28140 + 804 = 28944
Step 37: 28944 + 804 = 29748
Step 38: 29748 + 804 = 30552
Step 39: 30552 + 804 = 31356
Step 40: 31356 + 804 = 32160
Step 41: 32160 + 804 = 32964
Step 42: 32964 + 804 = 33768
Step 43: 33768 + 804 = 34572
Step 44: 34572 + 804 = 35376
Step 45: 35376 + 804 = 36180
Step 46: 36180 + 804 = 36984
Step 47: 36984 + 804 = 37788
Step 48: 37788 + 804 = 38592
Step 49: 38592 + 804 = 39396
Step 50: 39396 + 804 = 40200
Step 51: 40200 + 804 = 41004
Step 52: 41004 + 804 = 41808
Step 53: 41808 + 804 = 42612
Step 54: 42612 + 804 = 43416
Step 55: 43416 + 804 = 44220
Step 56: 44220 + 804 = 45024
Step 57: 45024 + 804 = 45828
Step 58: 45828 + 804 = 46632
Step 59: 46632 + 804 = 47436
Step 60: 47436 + 804 = 48240
Step 61: 48240 + 804 = 49044
Step 62: 49044 + 804 = 49848
Step 63: 49848 + 804 = 50652
Step 64: 50652 + 804 = 51456
Step 65: 51456 + 804 = 52260
Step 66: 52260 + 804 = 53064
Step 67: 53064 + 804 = 53868
Step 68: 53868 + 804 = 54672
Step 69: 54672 + 804 = 55476
Step 70: 55476 + 804 = 56280
Step 71: 56280 + 804 = 57084
Step 72: 57084 + 804 = 57888
Step 73: 57888 + 804 = 58692
Step 74: 58692 + 804 = 59496
Step 75: 59496 + 804 = 60300
Step 76: 60300 + 804 = 61104
Step 77: 61104 + 804 = 61908
Step 78: 61908 + 804 = 62712
Step 79: 62712 + 804 = 63516
Step 80: 63516 + 804 = 64320
Step 81: 64320 + 804 = 65124
Step 82: 65124 + 804 = 65928
Step 83: 65928 + 804 = 66732
Step 84: 66732 + 804 = 67536
Step 85: 67536 + 804 = 68340
Step 86: 68340 + 804 = 69144
Step 87: 69144 + 804 = 69948
Step 88: 69948 + 804 = 70752
Step 89: 70752 + 804 = 71556
Step 90: 71556 + 804 = 72360
Step 91: 72360 + 804 = 73164
Step 92: 73164 + 804 = 73968
Step 93: 73968 + 804 = 74772
Step 94: 74772 + 804 = 75576
Step 95: 75576 + 804 = 76380
Step 96: 76380 + 804 = 77184
Step 97: 77184 + 804 = 77988
Step 98: 77988 + 804 = 78792
Step 99: 78792 + 804 = 79596
Step 100: 79596 + 804 = 80400
Step 101: 80400 + 804 = 81204
Step 102: 81204 + 804 = 82008
Step 103: 82008 + 804 = 82812
Step 104: 82812 + 804 = 83616
Step 105: 83616 + 804 = 84420
Step 106: 84420 + 804 = 85224
Step 107: 85224 + 804 = 86028
Step 108: 86028 + 804 = 86832
Step 109: 86832 + 804 = 87636
Step 110: 87636 + 804 = 88440
Step 111: 88440 + 804 = 89244
Step 112: 89244 + 804 = 90048
Step 113: 90048 + 804 = 90852
Step 114: 90852 + 804 = 91656
Step 115: 91656 + 804 = 92460
Step 116: 92460 + 804 = 93264
Step 117: 93264 + 804 = 94068
Step 118: 94068 + 804 = 94872
Step 119: 94872 + 804 = 95676
Step 120: 95676 + 804 = 96480
Step 121: 96480 + 804 = 97284
Step 122: 97284 + 804 = 98088
Step 123: 98088 + 804 = 98892
Step 124: 98892 + 804 = 99696
Step 125: 99696 + 804 = 100500
Step 126: 100500 + 804 = 101304
Step 127: 101304 + 804 = 102108
Step 128: 102108 + 804 = 102912
Step 129: 102912 + 804 = 103716
Step 130: 103716 + 804 = 104520
Step 131: 104520 + 804 = 105324
Step 132: 105324 + 804 = 106128
Step 133: 106128 + 804 = 106932
Step 134: 106932 + 804 = 107736
Step 135: 107736 + 804 = 108540
Step 136: 108540 + 804 = 109344
Step 137: 109344 + 804 = 110148
Step 138: 110148 + 804 = 110952
Step 139: 110952 + 804 = 111756
Step 140: 111756 + 804 = 112560
Step 141: 112560 + 804 = 113364
Step 142: 113364 + 804 = 114168
Step 143: 114168 + 804 = 114972
Step 144: 114972 + 804 = 115776
Step 145: 115776 + 804 = 116580
Step 146: 116580 + 804 = 117384
Step 147: 117384 + 804 = 118188
Step 148: 118188 + 804 = 118992
Step 149: 118992 + 804 = 119796
Step 150: 119796 + 804 = 120600
Step 151: 120600 + 804 = 121404
Step 152: 121404 + 804 = 122208
Step 153: 122208 + 804 = 123012
Step 154: 123012 + 804 = 123816
Step 155: 123816 + 804 = 124620
Step 156: 124620 + 804 = 125424
Step 157: 125424 + 804 = 126228
Step 158: 126228 + 804 = 127032
Step 159: 127032 + 804 = 127836
Step 160: 127836 + 804 = 128640
Step 161: 128640 + 804 = 129444
Step 162: 129444 + 804 = 130248
Step 163: 130248 + 804 = 131052
Step 164: 131052 + 804 = 131856
Step 165: 131856 + 804 = 132660
Step 166: 132660 + 804 = 133464
Step 167: 133464 + 804 = 134268
Step 168: 134268 + 804 = 135072
Step 169: 135072 + 804 = 135876
Step 170: 135876 + 804 = 136680
Step 171: 136680 + 804 = 137484
Step 172: 137484 + 804 = 138288
Step 173: 138288 + 804 = 139092
Step 174: 139092 + 804 = 139896
Step 175: 139896 + 804 = 140700
Step 176: 140700 + 804 = 141504
Step 177: 141504 + 804 = 142308
Step 178: 142308 + 804 = 143112
Step 179: 143112 + 804 = 143916
Step 180: 143916 + 804 = 144720
Step 181: 144720 + 804 = 145524
Step 182: 145524 + 804 = 146328
Step 183: 146328 + 804 = 147132
Step 184: 147132 + 804 = 147936
Step 185: 147936 + 804 = 148740
Step 186: 148740 + 804 = 149544
Step 187: 149544 + 804 = 150348
Step 188: 150348 + 804 = 151152
Step 189: 151152 + 804 = 151956
Step 190: 151956 + 804 = 152760
Step 191: 152760 + 804 = 153564
Step 192: 153564 + 804 = 154368
Step 193: 154368 + 804 = 155172
Step 194: 155172 + 804 = 155976
Step 195: 155976 + 804 = 156780
Step 196: 156780 + 804 = 157584
Step 197: 157584 + 804 = 158388
Step 198: 158388 + 804 = 159192
Step 199: 159192 + 804 = 159996
Step 200: 159996 + 804 = 160800
Step 201: 160800 + 804 = 161604
Step 202: 161604 + 804 = 162408
Step 203: 162408 + 804 = 163212
Step 204: 163212 + 804 = 164016
Step 205: 164016 + 804 = 164820
Step 206: 164820 + 804 = 165624
Step 207: 165624 + 804 = 166428
Step 208: 166428 + 804 = 167232
Step 209: 167232 + 804 = 168036
Step 210: 168036 + 804 = 168840
Step 211: 168840 + 804 = 169644
Step 212: 169644 + 804 = 170448
Step 213: 170448 + 804 = 171252
Step 214: 171252 + 804 = 172056
Step 215: 172056 + 804 = 172860
Step 216: 172860 + 804 = 173664
Step 217: 173664 + 804 = 174468
Step 218: 174468 + 804 = 175272
Step 219: 175272 + 804 = 176076
Step 220: 176076 + 804 = 176880
Step 221: 176880 + 804 = 177684
Step 222: 177684 + 804 = 178488
Step 223: 178488 + 804 = 179292
Step 224: 179292 + 804 = 180096
Step 225: 180096 + 804 = 180900
Step 226: 180900 + 804 = 181704
Step 227: 181704 + 804 = 182508
Step 228: 182508 + 804 = 183312
Step 229: 183312 + 804 = 184116
Step 230: 184116 + 804 = 184920
Step 231: 184920 + 804 = 185724
Step 232: 185724 + 804 = 186528
Step 233: 186528 + 804 = 187332
Step 234: 187332 + 804 = 188136
Step 235: 188136 + 804 = 188940
Step 236: 188940 + 804 = 189744
Step 237: 189744 + 804 = 190548
Step 238: 190548 + 804 = 191352
Step 239: 191352 + 804 = 192156
Step 240: 192156 + 804 = 192960
Step 241: 192960 + 804 = 193764
Step 242: 193764 + 804 = 194568
Step 243: 194568 + 804 = 195372
Step 244: 195372 + 804 = 196176
Step 245: 196176 + 804 = 196980
Step 246: 196980 + 804 = 197784
Step 247: 197784 + 804 = 198588
Step 248: 198588 + 804 = 199392
Step 249: 199392 + 804 = 200196
Step 250: 200196 + 804 = 201000
Step 251: 201000 + 804 = 201804
Step 252: 201804 + 804 = 202608
Step 253: 202608 + 804 = 203412
Step 254: 203412 + 804 = 204216
Step 255: 204216 + 804 = 205020
Step 256: 205020 + 804 = 205824
Step 257: 205824 + 804 = 206628
Step 258: 206628 + 804 = 207432
Step 259: 207432 + 804 = 208236
Step 260: 208236 + 804 = 209040
Step 261: 209040 + 804 = 209844
Step 262: 209844 + 804 = 210648
Step 263: 210648 + 804 = 211452
Step 264: 211452 + 804 = 212256
Step 265: 212256 + 804 = 213060
Step 266: 213060 + 804 = 213864
Step 267: 213864 + 804 = 214668
Step 268: 214668 + 804 = 215472
Step 269: 215472 + 804 = 216276
Step 270: 216276 + 804 = 217080
Step 271: 217080 + 804 = 217884
Step 272: 217884 + 804 = 218688
Step 273: 218688 + 804 = 219492
Step 274: 219492 + 804 = 220296
Step 275: 220296 + 804 = 221100
Step 276: 221100 + 804 = 221904
Step 277: 221904 + 804 = 222708
Step 278: 222708 + 804 = 223512
Step 279: 223512 + 804 = 224316
Step 280: 224316 + 804 = 225120
Step 281: 225120 + 804 = 225924
Step 282: 225924 + 804 = 226728
Step 283: 226728 + 804 = 227532
Step 284: 227532 + 804 = 228336
Step 285: 228336 + 804 = 229140
Step 286: 229140 + 804 = 229944
Step 287: 229944 + 804 = 230748
Step 288: 230748 + 804 = 231552
Step 289: 231552 + 804 = 232356
Step 290: 232356 + 804 = 233160
Step 291: 233160 + 804 = 233964
Step 292: 233964 + 804 = 234768
Step 293: 234768 + 804 = 235572
Step 294: 235572 + 804 = 236376
Step 295: 236376 + 804 = 237180
Step 296: 237180 + 804 = 237984
Step 297: 237984 + 804 = 238788
Step 298: 238788 + 804 = 239592
Step 299: 239592 + 804 = 240396
Step 300: 240396 + 804 = 241200
Step 301: 241200 + 804 = 242004
Step 302: 242004 + 804 = 242808
Step 303: 242808 + 804 = 243612
Step 304: 243612 + 804 = 244416
Step 305: 244416 + 804 = 245220
Step 306: 245220 + 804 = 246024
Step 307: 246024 + 804 = 246828
Step 308: 246828 + 804 = 247632
Step 309: 247632 + 804 = 248436
Step 310: 248436 + 804 = 249240

So, 804*310 = 249240