Sure thing, let's get straight to it. We start with 845 and we're going to multiply it by 418, which means adding 845 to itself 418 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
Step 259: 218010 + 845 = 218855
Step 260: 218855 + 845 = 219700
Step 261: 219700 + 845 = 220545
Step 262: 220545 + 845 = 221390
Step 263: 221390 + 845 = 222235
Step 264: 222235 + 845 = 223080
Step 265: 223080 + 845 = 223925
Step 266: 223925 + 845 = 224770
Step 267: 224770 + 845 = 225615
Step 268: 225615 + 845 = 226460
Step 269: 226460 + 845 = 227305
Step 270: 227305 + 845 = 228150
Step 271: 228150 + 845 = 228995
Step 272: 228995 + 845 = 229840
Step 273: 229840 + 845 = 230685
Step 274: 230685 + 845 = 231530
Step 275: 231530 + 845 = 232375
Step 276: 232375 + 845 = 233220
Step 277: 233220 + 845 = 234065
Step 278: 234065 + 845 = 234910
Step 279: 234910 + 845 = 235755
Step 280: 235755 + 845 = 236600
Step 281: 236600 + 845 = 237445
Step 282: 237445 + 845 = 238290
Step 283: 238290 + 845 = 239135
Step 284: 239135 + 845 = 239980
Step 285: 239980 + 845 = 240825
Step 286: 240825 + 845 = 241670
Step 287: 241670 + 845 = 242515
Step 288: 242515 + 845 = 243360
Step 289: 243360 + 845 = 244205
Step 290: 244205 + 845 = 245050
Step 291: 245050 + 845 = 245895
Step 292: 245895 + 845 = 246740
Step 293: 246740 + 845 = 247585
Step 294: 247585 + 845 = 248430
Step 295: 248430 + 845 = 249275
Step 296: 249275 + 845 = 250120
Step 297: 250120 + 845 = 250965
Step 298: 250965 + 845 = 251810
Step 299: 251810 + 845 = 252655
Step 300: 252655 + 845 = 253500
Step 301: 253500 + 845 = 254345
Step 302: 254345 + 845 = 255190
Step 303: 255190 + 845 = 256035
Step 304: 256035 + 845 = 256880
Step 305: 256880 + 845 = 257725
Step 306: 257725 + 845 = 258570
Step 307: 258570 + 845 = 259415
Step 308: 259415 + 845 = 260260
Step 309: 260260 + 845 = 261105
Step 310: 261105 + 845 = 261950
Step 311: 261950 + 845 = 262795
Step 312: 262795 + 845 = 263640
Step 313: 263640 + 845 = 264485
Step 314: 264485 + 845 = 265330
Step 315: 265330 + 845 = 266175
Step 316: 266175 + 845 = 267020
Step 317: 267020 + 845 = 267865
Step 318: 267865 + 845 = 268710
Step 319: 268710 + 845 = 269555
Step 320: 269555 + 845 = 270400
Step 321: 270400 + 845 = 271245
Step 322: 271245 + 845 = 272090
Step 323: 272090 + 845 = 272935
Step 324: 272935 + 845 = 273780
Step 325: 273780 + 845 = 274625
Step 326: 274625 + 845 = 275470
Step 327: 275470 + 845 = 276315
Step 328: 276315 + 845 = 277160
Step 329: 277160 + 845 = 278005
Step 330: 278005 + 845 = 278850
Step 331: 278850 + 845 = 279695
Step 332: 279695 + 845 = 280540
Step 333: 280540 + 845 = 281385
Step 334: 281385 + 845 = 282230
Step 335: 282230 + 845 = 283075
Step 336: 283075 + 845 = 283920
Step 337: 283920 + 845 = 284765
Step 338: 284765 + 845 = 285610
Step 339: 285610 + 845 = 286455
Step 340: 286455 + 845 = 287300
Step 341: 287300 + 845 = 288145
Step 342: 288145 + 845 = 288990
Step 343: 288990 + 845 = 289835
Step 344: 289835 + 845 = 290680
Step 345: 290680 + 845 = 291525
Step 346: 291525 + 845 = 292370
Step 347: 292370 + 845 = 293215
Step 348: 293215 + 845 = 294060
Step 349: 294060 + 845 = 294905
Step 350: 294905 + 845 = 295750
Step 351: 295750 + 845 = 296595
Step 352: 296595 + 845 = 297440
Step 353: 297440 + 845 = 298285
Step 354: 298285 + 845 = 299130
Step 355: 299130 + 845 = 299975
Step 356: 299975 + 845 = 300820
Step 357: 300820 + 845 = 301665
Step 358: 301665 + 845 = 302510
Step 359: 302510 + 845 = 303355
Step 360: 303355 + 845 = 304200
Step 361: 304200 + 845 = 305045
Step 362: 305045 + 845 = 305890
Step 363: 305890 + 845 = 306735
Step 364: 306735 + 845 = 307580
Step 365: 307580 + 845 = 308425
Step 366: 308425 + 845 = 309270
Step 367: 309270 + 845 = 310115
Step 368: 310115 + 845 = 310960
Step 369: 310960 + 845 = 311805
Step 370: 311805 + 845 = 312650
Step 371: 312650 + 845 = 313495
Step 372: 313495 + 845 = 314340
Step 373: 314340 + 845 = 315185
Step 374: 315185 + 845 = 316030
Step 375: 316030 + 845 = 316875
Step 376: 316875 + 845 = 317720
Step 377: 317720 + 845 = 318565
Step 378: 318565 + 845 = 319410
Step 379: 319410 + 845 = 320255
Step 380: 320255 + 845 = 321100
Step 381: 321100 + 845 = 321945
Step 382: 321945 + 845 = 322790
Step 383: 322790 + 845 = 323635
Step 384: 323635 + 845 = 324480
Step 385: 324480 + 845 = 325325
Step 386: 325325 + 845 = 326170
Step 387: 326170 + 845 = 327015
Step 388: 327015 + 845 = 327860
Step 389: 327860 + 845 = 328705
Step 390: 328705 + 845 = 329550
Step 391: 329550 + 845 = 330395
Step 392: 330395 + 845 = 331240
Step 393: 331240 + 845 = 332085
Step 394: 332085 + 845 = 332930
Step 395: 332930 + 845 = 333775
Step 396: 333775 + 845 = 334620
Step 397: 334620 + 845 = 335465
Step 398: 335465 + 845 = 336310
Step 399: 336310 + 845 = 337155
Step 400: 337155 + 845 = 338000
Step 401: 338000 + 845 = 338845
Step 402: 338845 + 845 = 339690
Step 403: 339690 + 845 = 340535
Step 404: 340535 + 845 = 341380
Step 405: 341380 + 845 = 342225
Step 406: 342225 + 845 = 343070
Step 407: 343070 + 845 = 343915
Step 408: 343915 + 845 = 344760
Step 409: 344760 + 845 = 345605
Step 410: 345605 + 845 = 346450
Step 411: 346450 + 845 = 347295
Step 412: 347295 + 845 = 348140
Step 413: 348140 + 845 = 348985
Step 414: 348985 + 845 = 349830
Step 415: 349830 + 845 = 350675
Step 416: 350675 + 845 = 351520
Step 417: 351520 + 845 = 352365
Step 418: 352365 + 845 = 353210

So, 845*418 = 353210