Alright, let's solve this math problem step by step. First, we have the number 836. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 403. So, we're going to take the number 836 and add it to itself 403 times.
Step 1: 0 + 836 = 836
Step 2: 836 + 836 = 1672
Step 3: 1672 + 836 = 2508
Step 4: 2508 + 836 = 3344
Step 5: 3344 + 836 = 4180
Step 6: 4180 + 836 = 5016
Step 7: 5016 + 836 = 5852
Step 8: 5852 + 836 = 6688
Step 9: 6688 + 836 = 7524
Step 10: 7524 + 836 = 8360
Step 11: 8360 + 836 = 9196
Step 12: 9196 + 836 = 10032
Step 13: 10032 + 836 = 10868
Step 14: 10868 + 836 = 11704
Step 15: 11704 + 836 = 12540
Step 16: 12540 + 836 = 13376
Step 17: 13376 + 836 = 14212
Step 18: 14212 + 836 = 15048
Step 19: 15048 + 836 = 15884
Step 20: 15884 + 836 = 16720
Step 21: 16720 + 836 = 17556
Step 22: 17556 + 836 = 18392
Step 23: 18392 + 836 = 19228
Step 24: 19228 + 836 = 20064
Step 25: 20064 + 836 = 20900
Step 26: 20900 + 836 = 21736
Step 27: 21736 + 836 = 22572
Step 28: 22572 + 836 = 23408
Step 29: 23408 + 836 = 24244
Step 30: 24244 + 836 = 25080
Step 31: 25080 + 836 = 25916
Step 32: 25916 + 836 = 26752
Step 33: 26752 + 836 = 27588
Step 34: 27588 + 836 = 28424
Step 35: 28424 + 836 = 29260
Step 36: 29260 + 836 = 30096
Step 37: 30096 + 836 = 30932
Step 38: 30932 + 836 = 31768
Step 39: 31768 + 836 = 32604
Step 40: 32604 + 836 = 33440
Step 41: 33440 + 836 = 34276
Step 42: 34276 + 836 = 35112
Step 43: 35112 + 836 = 35948
Step 44: 35948 + 836 = 36784
Step 45: 36784 + 836 = 37620
Step 46: 37620 + 836 = 38456
Step 47: 38456 + 836 = 39292
Step 48: 39292 + 836 = 40128
Step 49: 40128 + 836 = 40964
Step 50: 40964 + 836 = 41800
Step 51: 41800 + 836 = 42636
Step 52: 42636 + 836 = 43472
Step 53: 43472 + 836 = 44308
Step 54: 44308 + 836 = 45144
Step 55: 45144 + 836 = 45980
Step 56: 45980 + 836 = 46816
Step 57: 46816 + 836 = 47652
Step 58: 47652 + 836 = 48488
Step 59: 48488 + 836 = 49324
Step 60: 49324 + 836 = 50160
Step 61: 50160 + 836 = 50996
Step 62: 50996 + 836 = 51832
Step 63: 51832 + 836 = 52668
Step 64: 52668 + 836 = 53504
Step 65: 53504 + 836 = 54340
Step 66: 54340 + 836 = 55176
Step 67: 55176 + 836 = 56012
Step 68: 56012 + 836 = 56848
Step 69: 56848 + 836 = 57684
Step 70: 57684 + 836 = 58520
Step 71: 58520 + 836 = 59356
Step 72: 59356 + 836 = 60192
Step 73: 60192 + 836 = 61028
Step 74: 61028 + 836 = 61864
Step 75: 61864 + 836 = 62700
Step 76: 62700 + 836 = 63536
Step 77: 63536 + 836 = 64372
Step 78: 64372 + 836 = 65208
Step 79: 65208 + 836 = 66044
Step 80: 66044 + 836 = 66880
Step 81: 66880 + 836 = 67716
Step 82: 67716 + 836 = 68552
Step 83: 68552 + 836 = 69388
Step 84: 69388 + 836 = 70224
Step 85: 70224 + 836 = 71060
Step 86: 71060 + 836 = 71896
Step 87: 71896 + 836 = 72732
Step 88: 72732 + 836 = 73568
Step 89: 73568 + 836 = 74404
Step 90: 74404 + 836 = 75240
Step 91: 75240 + 836 = 76076
Step 92: 76076 + 836 = 76912
Step 93: 76912 + 836 = 77748
Step 94: 77748 + 836 = 78584
Step 95: 78584 + 836 = 79420
Step 96: 79420 + 836 = 80256
Step 97: 80256 + 836 = 81092
Step 98: 81092 + 836 = 81928
Step 99: 81928 + 836 = 82764
Step 100: 82764 + 836 = 83600
Step 101: 83600 + 836 = 84436
Step 102: 84436 + 836 = 85272
Step 103: 85272 + 836 = 86108
Step 104: 86108 + 836 = 86944
Step 105: 86944 + 836 = 87780
Step 106: 87780 + 836 = 88616
Step 107: 88616 + 836 = 89452
Step 108: 89452 + 836 = 90288
Step 109: 90288 + 836 = 91124
Step 110: 91124 + 836 = 91960
Step 111: 91960 + 836 = 92796
Step 112: 92796 + 836 = 93632
Step 113: 93632 + 836 = 94468
Step 114: 94468 + 836 = 95304
Step 115: 95304 + 836 = 96140
Step 116: 96140 + 836 = 96976
Step 117: 96976 + 836 = 97812
Step 118: 97812 + 836 = 98648
Step 119: 98648 + 836 = 99484
Step 120: 99484 + 836 = 100320
Step 121: 100320 + 836 = 101156
Step 122: 101156 + 836 = 101992
Step 123: 101992 + 836 = 102828
Step 124: 102828 + 836 = 103664
Step 125: 103664 + 836 = 104500
Step 126: 104500 + 836 = 105336
Step 127: 105336 + 836 = 106172
Step 128: 106172 + 836 = 107008
Step 129: 107008 + 836 = 107844
Step 130: 107844 + 836 = 108680
Step 131: 108680 + 836 = 109516
Step 132: 109516 + 836 = 110352
Step 133: 110352 + 836 = 111188
Step 134: 111188 + 836 = 112024
Step 135: 112024 + 836 = 112860
Step 136: 112860 + 836 = 113696
Step 137: 113696 + 836 = 114532
Step 138: 114532 + 836 = 115368
Step 139: 115368 + 836 = 116204
Step 140: 116204 + 836 = 117040
Step 141: 117040 + 836 = 117876
Step 142: 117876 + 836 = 118712
Step 143: 118712 + 836 = 119548
Step 144: 119548 + 836 = 120384
Step 145: 120384 + 836 = 121220
Step 146: 121220 + 836 = 122056
Step 147: 122056 + 836 = 122892
Step 148: 122892 + 836 = 123728
Step 149: 123728 + 836 = 124564
Step 150: 124564 + 836 = 125400
Step 151: 125400 + 836 = 126236
Step 152: 126236 + 836 = 127072
Step 153: 127072 + 836 = 127908
Step 154: 127908 + 836 = 128744
Step 155: 128744 + 836 = 129580
Step 156: 129580 + 836 = 130416
Step 157: 130416 + 836 = 131252
Step 158: 131252 + 836 = 132088
Step 159: 132088 + 836 = 132924
Step 160: 132924 + 836 = 133760
Step 161: 133760 + 836 = 134596
Step 162: 134596 + 836 = 135432
Step 163: 135432 + 836 = 136268
Step 164: 136268 + 836 = 137104
Step 165: 137104 + 836 = 137940
Step 166: 137940 + 836 = 138776
Step 167: 138776 + 836 = 139612
Step 168: 139612 + 836 = 140448
Step 169: 140448 + 836 = 141284
Step 170: 141284 + 836 = 142120
Step 171: 142120 + 836 = 142956
Step 172: 142956 + 836 = 143792
Step 173: 143792 + 836 = 144628
Step 174: 144628 + 836 = 145464
Step 175: 145464 + 836 = 146300
Step 176: 146300 + 836 = 147136
Step 177: 147136 + 836 = 147972
Step 178: 147972 + 836 = 148808
Step 179: 148808 + 836 = 149644
Step 180: 149644 + 836 = 150480
Step 181: 150480 + 836 = 151316
Step 182: 151316 + 836 = 152152
Step 183: 152152 + 836 = 152988
Step 184: 152988 + 836 = 153824
Step 185: 153824 + 836 = 154660
Step 186: 154660 + 836 = 155496
Step 187: 155496 + 836 = 156332
Step 188: 156332 + 836 = 157168
Step 189: 157168 + 836 = 158004
Step 190: 158004 + 836 = 158840
Step 191: 158840 + 836 = 159676
Step 192: 159676 + 836 = 160512
Step 193: 160512 + 836 = 161348
Step 194: 161348 + 836 = 162184
Step 195: 162184 + 836 = 163020
Step 196: 163020 + 836 = 163856
Step 197: 163856 + 836 = 164692
Step 198: 164692 + 836 = 165528
Step 199: 165528 + 836 = 166364
Step 200: 166364 + 836 = 167200
Step 201: 167200 + 836 = 168036
Step 202: 168036 + 836 = 168872
Step 203: 168872 + 836 = 169708
Step 204: 169708 + 836 = 170544
Step 205: 170544 + 836 = 171380
Step 206: 171380 + 836 = 172216
Step 207: 172216 + 836 = 173052
Step 208: 173052 + 836 = 173888
Step 209: 173888 + 836 = 174724
Step 210: 174724 + 836 = 175560
Step 211: 175560 + 836 = 176396
Step 212: 176396 + 836 = 177232
Step 213: 177232 + 836 = 178068
Step 214: 178068 + 836 = 178904
Step 215: 178904 + 836 = 179740
Step 216: 179740 + 836 = 180576
Step 217: 180576 + 836 = 181412
Step 218: 181412 + 836 = 182248
Step 219: 182248 + 836 = 183084
Step 220: 183084 + 836 = 183920
Step 221: 183920 + 836 = 184756
Step 222: 184756 + 836 = 185592
Step 223: 185592 + 836 = 186428
Step 224: 186428 + 836 = 187264
Step 225: 187264 + 836 = 188100
Step 226: 188100 + 836 = 188936
Step 227: 188936 + 836 = 189772
Step 228: 189772 + 836 = 190608
Step 229: 190608 + 836 = 191444
Step 230: 191444 + 836 = 192280
Step 231: 192280 + 836 = 193116
Step 232: 193116 + 836 = 193952
Step 233: 193952 + 836 = 194788
Step 234: 194788 + 836 = 195624
Step 235: 195624 + 836 = 196460
Step 236: 196460 + 836 = 197296
Step 237: 197296 + 836 = 198132
Step 238: 198132 + 836 = 198968
Step 239: 198968 + 836 = 199804
Step 240: 199804 + 836 = 200640
Step 241: 200640 + 836 = 201476
Step 242: 201476 + 836 = 202312
Step 243: 202312 + 836 = 203148
Step 244: 203148 + 836 = 203984
Step 245: 203984 + 836 = 204820
Step 246: 204820 + 836 = 205656
Step 247: 205656 + 836 = 206492
Step 248: 206492 + 836 = 207328
Step 249: 207328 + 836 = 208164
Step 250: 208164 + 836 = 209000
Step 251: 209000 + 836 = 209836
Step 252: 209836 + 836 = 210672
Step 253: 210672 + 836 = 211508
Step 254: 211508 + 836 = 212344
Step 255: 212344 + 836 = 213180
Step 256: 213180 + 836 = 214016
Step 257: 214016 + 836 = 214852
Step 258: 214852 + 836 = 215688
Step 259: 215688 + 836 = 216524
Step 260: 216524 + 836 = 217360
Step 261: 217360 + 836 = 218196
Step 262: 218196 + 836 = 219032
Step 263: 219032 + 836 = 219868
Step 264: 219868 + 836 = 220704
Step 265: 220704 + 836 = 221540
Step 266: 221540 + 836 = 222376
Step 267: 222376 + 836 = 223212
Step 268: 223212 + 836 = 224048
Step 269: 224048 + 836 = 224884
Step 270: 224884 + 836 = 225720
Step 271: 225720 + 836 = 226556
Step 272: 226556 + 836 = 227392
Step 273: 227392 + 836 = 228228
Step 274: 228228 + 836 = 229064
Step 275: 229064 + 836 = 229900
Step 276: 229900 + 836 = 230736
Step 277: 230736 + 836 = 231572
Step 278: 231572 + 836 = 232408
Step 279: 232408 + 836 = 233244
Step 280: 233244 + 836 = 234080
Step 281: 234080 + 836 = 234916
Step 282: 234916 + 836 = 235752
Step 283: 235752 + 836 = 236588
Step 284: 236588 + 836 = 237424
Step 285: 237424 + 836 = 238260
Step 286: 238260 + 836 = 239096
Step 287: 239096 + 836 = 239932
Step 288: 239932 + 836 = 240768
Step 289: 240768 + 836 = 241604
Step 290: 241604 + 836 = 242440
Step 291: 242440 + 836 = 243276
Step 292: 243276 + 836 = 244112
Step 293: 244112 + 836 = 244948
Step 294: 244948 + 836 = 245784
Step 295: 245784 + 836 = 246620
Step 296: 246620 + 836 = 247456
Step 297: 247456 + 836 = 248292
Step 298: 248292 + 836 = 249128
Step 299: 249128 + 836 = 249964
Step 300: 249964 + 836 = 250800
Step 301: 250800 + 836 = 251636
Step 302: 251636 + 836 = 252472
Step 303: 252472 + 836 = 253308
Step 304: 253308 + 836 = 254144
Step 305: 254144 + 836 = 254980
Step 306: 254980 + 836 = 255816
Step 307: 255816 + 836 = 256652
Step 308: 256652 + 836 = 257488
Step 309: 257488 + 836 = 258324
Step 310: 258324 + 836 = 259160
Step 311: 259160 + 836 = 259996
Step 312: 259996 + 836 = 260832
Step 313: 260832 + 836 = 261668
Step 314: 261668 + 836 = 262504
Step 315: 262504 + 836 = 263340
Step 316: 263340 + 836 = 264176
Step 317: 264176 + 836 = 265012
Step 318: 265012 + 836 = 265848
Step 319: 265848 + 836 = 266684
Step 320: 266684 + 836 = 267520
Step 321: 267520 + 836 = 268356
Step 322: 268356 + 836 = 269192
Step 323: 269192 + 836 = 270028
Step 324: 270028 + 836 = 270864
Step 325: 270864 + 836 = 271700
Step 326: 271700 + 836 = 272536
Step 327: 272536 + 836 = 273372
Step 328: 273372 + 836 = 274208
Step 329: 274208 + 836 = 275044
Step 330: 275044 + 836 = 275880
Step 331: 275880 + 836 = 276716
Step 332: 276716 + 836 = 277552
Step 333: 277552 + 836 = 278388
Step 334: 278388 + 836 = 279224
Step 335: 279224 + 836 = 280060
Step 336: 280060 + 836 = 280896
Step 337: 280896 + 836 = 281732
Step 338: 281732 + 836 = 282568
Step 339: 282568 + 836 = 283404
Step 340: 283404 + 836 = 284240
Step 341: 284240 + 836 = 285076
Step 342: 285076 + 836 = 285912
Step 343: 285912 + 836 = 286748
Step 344: 286748 + 836 = 287584
Step 345: 287584 + 836 = 288420
Step 346: 288420 + 836 = 289256
Step 347: 289256 + 836 = 290092
Step 348: 290092 + 836 = 290928
Step 349: 290928 + 836 = 291764
Step 350: 291764 + 836 = 292600
Step 351: 292600 + 836 = 293436
Step 352: 293436 + 836 = 294272
Step 353: 294272 + 836 = 295108
Step 354: 295108 + 836 = 295944
Step 355: 295944 + 836 = 296780
Step 356: 296780 + 836 = 297616
Step 357: 297616 + 836 = 298452
Step 358: 298452 + 836 = 299288
Step 359: 299288 + 836 = 300124
Step 360: 300124 + 836 = 300960
Step 361: 300960 + 836 = 301796
Step 362: 301796 + 836 = 302632
Step 363: 302632 + 836 = 303468
Step 364: 303468 + 836 = 304304
Step 365: 304304 + 836 = 305140
Step 366: 305140 + 836 = 305976
Step 367: 305976 + 836 = 306812
Step 368: 306812 + 836 = 307648
Step 369: 307648 + 836 = 308484
Step 370: 308484 + 836 = 309320
Step 371: 309320 + 836 = 310156
Step 372: 310156 + 836 = 310992
Step 373: 310992 + 836 = 311828
Step 374: 311828 + 836 = 312664
Step 375: 312664 + 836 = 313500
Step 376: 313500 + 836 = 314336
Step 377: 314336 + 836 = 315172
Step 378: 315172 + 836 = 316008
Step 379: 316008 + 836 = 316844
Step 380: 316844 + 836 = 317680
Step 381: 317680 + 836 = 318516
Step 382: 318516 + 836 = 319352
Step 383: 319352 + 836 = 320188
Step 384: 320188 + 836 = 321024
Step 385: 321024 + 836 = 321860
Step 386: 321860 + 836 = 322696
Step 387: 322696 + 836 = 323532
Step 388: 323532 + 836 = 324368
Step 389: 324368 + 836 = 325204
Step 390: 325204 + 836 = 326040
Step 391: 326040 + 836 = 326876
Step 392: 326876 + 836 = 327712
Step 393: 327712 + 836 = 328548
Step 394: 328548 + 836 = 329384
Step 395: 329384 + 836 = 330220
Step 396: 330220 + 836 = 331056
Step 397: 331056 + 836 = 331892
Step 398: 331892 + 836 = 332728
Step 399: 332728 + 836 = 333564
Step 400: 333564 + 836 = 334400
Step 401: 334400 + 836 = 335236
Step 402: 335236 + 836 = 336072
Step 403: 336072 + 836 = 336908

So, 836*403 = 336908