Alright, let's solve this math problem step by step. First, we have the number 845. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 258. So, we're going to take the number 845 and add it to itself 258 times.
Step 1: 0 + 845 = 845
Step 2: 845 + 845 = 1690
Step 3: 1690 + 845 = 2535
Step 4: 2535 + 845 = 3380
Step 5: 3380 + 845 = 4225
Step 6: 4225 + 845 = 5070
Step 7: 5070 + 845 = 5915
Step 8: 5915 + 845 = 6760
Step 9: 6760 + 845 = 7605
Step 10: 7605 + 845 = 8450
Step 11: 8450 + 845 = 9295
Step 12: 9295 + 845 = 10140
Step 13: 10140 + 845 = 10985
Step 14: 10985 + 845 = 11830
Step 15: 11830 + 845 = 12675
Step 16: 12675 + 845 = 13520
Step 17: 13520 + 845 = 14365
Step 18: 14365 + 845 = 15210
Step 19: 15210 + 845 = 16055
Step 20: 16055 + 845 = 16900
Step 21: 16900 + 845 = 17745
Step 22: 17745 + 845 = 18590
Step 23: 18590 + 845 = 19435
Step 24: 19435 + 845 = 20280
Step 25: 20280 + 845 = 21125
Step 26: 21125 + 845 = 21970
Step 27: 21970 + 845 = 22815
Step 28: 22815 + 845 = 23660
Step 29: 23660 + 845 = 24505
Step 30: 24505 + 845 = 25350
Step 31: 25350 + 845 = 26195
Step 32: 26195 + 845 = 27040
Step 33: 27040 + 845 = 27885
Step 34: 27885 + 845 = 28730
Step 35: 28730 + 845 = 29575
Step 36: 29575 + 845 = 30420
Step 37: 30420 + 845 = 31265
Step 38: 31265 + 845 = 32110
Step 39: 32110 + 845 = 32955
Step 40: 32955 + 845 = 33800
Step 41: 33800 + 845 = 34645
Step 42: 34645 + 845 = 35490
Step 43: 35490 + 845 = 36335
Step 44: 36335 + 845 = 37180
Step 45: 37180 + 845 = 38025
Step 46: 38025 + 845 = 38870
Step 47: 38870 + 845 = 39715
Step 48: 39715 + 845 = 40560
Step 49: 40560 + 845 = 41405
Step 50: 41405 + 845 = 42250
Step 51: 42250 + 845 = 43095
Step 52: 43095 + 845 = 43940
Step 53: 43940 + 845 = 44785
Step 54: 44785 + 845 = 45630
Step 55: 45630 + 845 = 46475
Step 56: 46475 + 845 = 47320
Step 57: 47320 + 845 = 48165
Step 58: 48165 + 845 = 49010
Step 59: 49010 + 845 = 49855
Step 60: 49855 + 845 = 50700
Step 61: 50700 + 845 = 51545
Step 62: 51545 + 845 = 52390
Step 63: 52390 + 845 = 53235
Step 64: 53235 + 845 = 54080
Step 65: 54080 + 845 = 54925
Step 66: 54925 + 845 = 55770
Step 67: 55770 + 845 = 56615
Step 68: 56615 + 845 = 57460
Step 69: 57460 + 845 = 58305
Step 70: 58305 + 845 = 59150
Step 71: 59150 + 845 = 59995
Step 72: 59995 + 845 = 60840
Step 73: 60840 + 845 = 61685
Step 74: 61685 + 845 = 62530
Step 75: 62530 + 845 = 63375
Step 76: 63375 + 845 = 64220
Step 77: 64220 + 845 = 65065
Step 78: 65065 + 845 = 65910
Step 79: 65910 + 845 = 66755
Step 80: 66755 + 845 = 67600
Step 81: 67600 + 845 = 68445
Step 82: 68445 + 845 = 69290
Step 83: 69290 + 845 = 70135
Step 84: 70135 + 845 = 70980
Step 85: 70980 + 845 = 71825
Step 86: 71825 + 845 = 72670
Step 87: 72670 + 845 = 73515
Step 88: 73515 + 845 = 74360
Step 89: 74360 + 845 = 75205
Step 90: 75205 + 845 = 76050
Step 91: 76050 + 845 = 76895
Step 92: 76895 + 845 = 77740
Step 93: 77740 + 845 = 78585
Step 94: 78585 + 845 = 79430
Step 95: 79430 + 845 = 80275
Step 96: 80275 + 845 = 81120
Step 97: 81120 + 845 = 81965
Step 98: 81965 + 845 = 82810
Step 99: 82810 + 845 = 83655
Step 100: 83655 + 845 = 84500
Step 101: 84500 + 845 = 85345
Step 102: 85345 + 845 = 86190
Step 103: 86190 + 845 = 87035
Step 104: 87035 + 845 = 87880
Step 105: 87880 + 845 = 88725
Step 106: 88725 + 845 = 89570
Step 107: 89570 + 845 = 90415
Step 108: 90415 + 845 = 91260
Step 109: 91260 + 845 = 92105
Step 110: 92105 + 845 = 92950
Step 111: 92950 + 845 = 93795
Step 112: 93795 + 845 = 94640
Step 113: 94640 + 845 = 95485
Step 114: 95485 + 845 = 96330
Step 115: 96330 + 845 = 97175
Step 116: 97175 + 845 = 98020
Step 117: 98020 + 845 = 98865
Step 118: 98865 + 845 = 99710
Step 119: 99710 + 845 = 100555
Step 120: 100555 + 845 = 101400
Step 121: 101400 + 845 = 102245
Step 122: 102245 + 845 = 103090
Step 123: 103090 + 845 = 103935
Step 124: 103935 + 845 = 104780
Step 125: 104780 + 845 = 105625
Step 126: 105625 + 845 = 106470
Step 127: 106470 + 845 = 107315
Step 128: 107315 + 845 = 108160
Step 129: 108160 + 845 = 109005
Step 130: 109005 + 845 = 109850
Step 131: 109850 + 845 = 110695
Step 132: 110695 + 845 = 111540
Step 133: 111540 + 845 = 112385
Step 134: 112385 + 845 = 113230
Step 135: 113230 + 845 = 114075
Step 136: 114075 + 845 = 114920
Step 137: 114920 + 845 = 115765
Step 138: 115765 + 845 = 116610
Step 139: 116610 + 845 = 117455
Step 140: 117455 + 845 = 118300
Step 141: 118300 + 845 = 119145
Step 142: 119145 + 845 = 119990
Step 143: 119990 + 845 = 120835
Step 144: 120835 + 845 = 121680
Step 145: 121680 + 845 = 122525
Step 146: 122525 + 845 = 123370
Step 147: 123370 + 845 = 124215
Step 148: 124215 + 845 = 125060
Step 149: 125060 + 845 = 125905
Step 150: 125905 + 845 = 126750
Step 151: 126750 + 845 = 127595
Step 152: 127595 + 845 = 128440
Step 153: 128440 + 845 = 129285
Step 154: 129285 + 845 = 130130
Step 155: 130130 + 845 = 130975
Step 156: 130975 + 845 = 131820
Step 157: 131820 + 845 = 132665
Step 158: 132665 + 845 = 133510
Step 159: 133510 + 845 = 134355
Step 160: 134355 + 845 = 135200
Step 161: 135200 + 845 = 136045
Step 162: 136045 + 845 = 136890
Step 163: 136890 + 845 = 137735
Step 164: 137735 + 845 = 138580
Step 165: 138580 + 845 = 139425
Step 166: 139425 + 845 = 140270
Step 167: 140270 + 845 = 141115
Step 168: 141115 + 845 = 141960
Step 169: 141960 + 845 = 142805
Step 170: 142805 + 845 = 143650
Step 171: 143650 + 845 = 144495
Step 172: 144495 + 845 = 145340
Step 173: 145340 + 845 = 146185
Step 174: 146185 + 845 = 147030
Step 175: 147030 + 845 = 147875
Step 176: 147875 + 845 = 148720
Step 177: 148720 + 845 = 149565
Step 178: 149565 + 845 = 150410
Step 179: 150410 + 845 = 151255
Step 180: 151255 + 845 = 152100
Step 181: 152100 + 845 = 152945
Step 182: 152945 + 845 = 153790
Step 183: 153790 + 845 = 154635
Step 184: 154635 + 845 = 155480
Step 185: 155480 + 845 = 156325
Step 186: 156325 + 845 = 157170
Step 187: 157170 + 845 = 158015
Step 188: 158015 + 845 = 158860
Step 189: 158860 + 845 = 159705
Step 190: 159705 + 845 = 160550
Step 191: 160550 + 845 = 161395
Step 192: 161395 + 845 = 162240
Step 193: 162240 + 845 = 163085
Step 194: 163085 + 845 = 163930
Step 195: 163930 + 845 = 164775
Step 196: 164775 + 845 = 165620
Step 197: 165620 + 845 = 166465
Step 198: 166465 + 845 = 167310
Step 199: 167310 + 845 = 168155
Step 200: 168155 + 845 = 169000
Step 201: 169000 + 845 = 169845
Step 202: 169845 + 845 = 170690
Step 203: 170690 + 845 = 171535
Step 204: 171535 + 845 = 172380
Step 205: 172380 + 845 = 173225
Step 206: 173225 + 845 = 174070
Step 207: 174070 + 845 = 174915
Step 208: 174915 + 845 = 175760
Step 209: 175760 + 845 = 176605
Step 210: 176605 + 845 = 177450
Step 211: 177450 + 845 = 178295
Step 212: 178295 + 845 = 179140
Step 213: 179140 + 845 = 179985
Step 214: 179985 + 845 = 180830
Step 215: 180830 + 845 = 181675
Step 216: 181675 + 845 = 182520
Step 217: 182520 + 845 = 183365
Step 218: 183365 + 845 = 184210
Step 219: 184210 + 845 = 185055
Step 220: 185055 + 845 = 185900
Step 221: 185900 + 845 = 186745
Step 222: 186745 + 845 = 187590
Step 223: 187590 + 845 = 188435
Step 224: 188435 + 845 = 189280
Step 225: 189280 + 845 = 190125
Step 226: 190125 + 845 = 190970
Step 227: 190970 + 845 = 191815
Step 228: 191815 + 845 = 192660
Step 229: 192660 + 845 = 193505
Step 230: 193505 + 845 = 194350
Step 231: 194350 + 845 = 195195
Step 232: 195195 + 845 = 196040
Step 233: 196040 + 845 = 196885
Step 234: 196885 + 845 = 197730
Step 235: 197730 + 845 = 198575
Step 236: 198575 + 845 = 199420
Step 237: 199420 + 845 = 200265
Step 238: 200265 + 845 = 201110
Step 239: 201110 + 845 = 201955
Step 240: 201955 + 845 = 202800
Step 241: 202800 + 845 = 203645
Step 242: 203645 + 845 = 204490
Step 243: 204490 + 845 = 205335
Step 244: 205335 + 845 = 206180
Step 245: 206180 + 845 = 207025
Step 246: 207025 + 845 = 207870
Step 247: 207870 + 845 = 208715
Step 248: 208715 + 845 = 209560
Step 249: 209560 + 845 = 210405
Step 250: 210405 + 845 = 211250
Step 251: 211250 + 845 = 212095
Step 252: 212095 + 845 = 212940
Step 253: 212940 + 845 = 213785
Step 254: 213785 + 845 = 214630
Step 255: 214630 + 845 = 215475
Step 256: 215475 + 845 = 216320
Step 257: 216320 + 845 = 217165
Step 258: 217165 + 845 = 218010

So, 845*258 = 218010