OK, let's work through this together. We're starting with 31 and we're going to multiply it by 361, which means we add 31 to itself 361 times.
Step 1: 0 + 31 = 31
Step 2: 31 + 31 = 62
Step 3: 62 + 31 = 93
Step 4: 93 + 31 = 124
Step 5: 124 + 31 = 155
Step 6: 155 + 31 = 186
Step 7: 186 + 31 = 217
Step 8: 217 + 31 = 248
Step 9: 248 + 31 = 279
Step 10: 279 + 31 = 310
Step 11: 310 + 31 = 341
Step 12: 341 + 31 = 372
Step 13: 372 + 31 = 403
Step 14: 403 + 31 = 434
Step 15: 434 + 31 = 465
Step 16: 465 + 31 = 496
Step 17: 496 + 31 = 527
Step 18: 527 + 31 = 558
Step 19: 558 + 31 = 589
Step 20: 589 + 31 = 620
Step 21: 620 + 31 = 651
Step 22: 651 + 31 = 682
Step 23: 682 + 31 = 713
Step 24: 713 + 31 = 744
Step 25: 744 + 31 = 775
Step 26: 775 + 31 = 806
Step 27: 806 + 31 = 837
Step 28: 837 + 31 = 868
Step 29: 868 + 31 = 899
Step 30: 899 + 31 = 930
Step 31: 930 + 31 = 961
Step 32: 961 + 31 = 992
Step 33: 992 + 31 = 1023
Step 34: 1023 + 31 = 1054
Step 35: 1054 + 31 = 1085
Step 36: 1085 + 31 = 1116
Step 37: 1116 + 31 = 1147
Step 38: 1147 + 31 = 1178
Step 39: 1178 + 31 = 1209
Step 40: 1209 + 31 = 1240
Step 41: 1240 + 31 = 1271
Step 42: 1271 + 31 = 1302
Step 43: 1302 + 31 = 1333
Step 44: 1333 + 31 = 1364
Step 45: 1364 + 31 = 1395
Step 46: 1395 + 31 = 1426
Step 47: 1426 + 31 = 1457
Step 48: 1457 + 31 = 1488
Step 49: 1488 + 31 = 1519
Step 50: 1519 + 31 = 1550
Step 51: 1550 + 31 = 1581
Step 52: 1581 + 31 = 1612
Step 53: 1612 + 31 = 1643
Step 54: 1643 + 31 = 1674
Step 55: 1674 + 31 = 1705
Step 56: 1705 + 31 = 1736
Step 57: 1736 + 31 = 1767
Step 58: 1767 + 31 = 1798
Step 59: 1798 + 31 = 1829
Step 60: 1829 + 31 = 1860
Step 61: 1860 + 31 = 1891
Step 62: 1891 + 31 = 1922
Step 63: 1922 + 31 = 1953
Step 64: 1953 + 31 = 1984
Step 65: 1984 + 31 = 2015
Step 66: 2015 + 31 = 2046
Step 67: 2046 + 31 = 2077
Step 68: 2077 + 31 = 2108
Step 69: 2108 + 31 = 2139
Step 70: 2139 + 31 = 2170
Step 71: 2170 + 31 = 2201
Step 72: 2201 + 31 = 2232
Step 73: 2232 + 31 = 2263
Step 74: 2263 + 31 = 2294
Step 75: 2294 + 31 = 2325
Step 76: 2325 + 31 = 2356
Step 77: 2356 + 31 = 2387
Step 78: 2387 + 31 = 2418
Step 79: 2418 + 31 = 2449
Step 80: 2449 + 31 = 2480
Step 81: 2480 + 31 = 2511
Step 82: 2511 + 31 = 2542
Step 83: 2542 + 31 = 2573
Step 84: 2573 + 31 = 2604
Step 85: 2604 + 31 = 2635
Step 86: 2635 + 31 = 2666
Step 87: 2666 + 31 = 2697
Step 88: 2697 + 31 = 2728
Step 89: 2728 + 31 = 2759
Step 90: 2759 + 31 = 2790
Step 91: 2790 + 31 = 2821
Step 92: 2821 + 31 = 2852
Step 93: 2852 + 31 = 2883
Step 94: 2883 + 31 = 2914
Step 95: 2914 + 31 = 2945
Step 96: 2945 + 31 = 2976
Step 97: 2976 + 31 = 3007
Step 98: 3007 + 31 = 3038
Step 99: 3038 + 31 = 3069
Step 100: 3069 + 31 = 3100
Step 101: 3100 + 31 = 3131
Step 102: 3131 + 31 = 3162
Step 103: 3162 + 31 = 3193
Step 104: 3193 + 31 = 3224
Step 105: 3224 + 31 = 3255
Step 106: 3255 + 31 = 3286
Step 107: 3286 + 31 = 3317
Step 108: 3317 + 31 = 3348
Step 109: 3348 + 31 = 3379
Step 110: 3379 + 31 = 3410
Step 111: 3410 + 31 = 3441
Step 112: 3441 + 31 = 3472
Step 113: 3472 + 31 = 3503
Step 114: 3503 + 31 = 3534
Step 115: 3534 + 31 = 3565
Step 116: 3565 + 31 = 3596
Step 117: 3596 + 31 = 3627
Step 118: 3627 + 31 = 3658
Step 119: 3658 + 31 = 3689
Step 120: 3689 + 31 = 3720
Step 121: 3720 + 31 = 3751
Step 122: 3751 + 31 = 3782
Step 123: 3782 + 31 = 3813
Step 124: 3813 + 31 = 3844
Step 125: 3844 + 31 = 3875
Step 126: 3875 + 31 = 3906
Step 127: 3906 + 31 = 3937
Step 128: 3937 + 31 = 3968
Step 129: 3968 + 31 = 3999
Step 130: 3999 + 31 = 4030
Step 131: 4030 + 31 = 4061
Step 132: 4061 + 31 = 4092
Step 133: 4092 + 31 = 4123
Step 134: 4123 + 31 = 4154
Step 135: 4154 + 31 = 4185
Step 136: 4185 + 31 = 4216
Step 137: 4216 + 31 = 4247
Step 138: 4247 + 31 = 4278
Step 139: 4278 + 31 = 4309
Step 140: 4309 + 31 = 4340
Step 141: 4340 + 31 = 4371
Step 142: 4371 + 31 = 4402
Step 143: 4402 + 31 = 4433
Step 144: 4433 + 31 = 4464
Step 145: 4464 + 31 = 4495
Step 146: 4495 + 31 = 4526
Step 147: 4526 + 31 = 4557
Step 148: 4557 + 31 = 4588
Step 149: 4588 + 31 = 4619
Step 150: 4619 + 31 = 4650
Step 151: 4650 + 31 = 4681
Step 152: 4681 + 31 = 4712
Step 153: 4712 + 31 = 4743
Step 154: 4743 + 31 = 4774
Step 155: 4774 + 31 = 4805
Step 156: 4805 + 31 = 4836
Step 157: 4836 + 31 = 4867
Step 158: 4867 + 31 = 4898
Step 159: 4898 + 31 = 4929
Step 160: 4929 + 31 = 4960
Step 161: 4960 + 31 = 4991
Step 162: 4991 + 31 = 5022
Step 163: 5022 + 31 = 5053
Step 164: 5053 + 31 = 5084
Step 165: 5084 + 31 = 5115
Step 166: 5115 + 31 = 5146
Step 167: 5146 + 31 = 5177
Step 168: 5177 + 31 = 5208
Step 169: 5208 + 31 = 5239
Step 170: 5239 + 31 = 5270
Step 171: 5270 + 31 = 5301
Step 172: 5301 + 31 = 5332
Step 173: 5332 + 31 = 5363
Step 174: 5363 + 31 = 5394
Step 175: 5394 + 31 = 5425
Step 176: 5425 + 31 = 5456
Step 177: 5456 + 31 = 5487
Step 178: 5487 + 31 = 5518
Step 179: 5518 + 31 = 5549
Step 180: 5549 + 31 = 5580
Step 181: 5580 + 31 = 5611
Step 182: 5611 + 31 = 5642
Step 183: 5642 + 31 = 5673
Step 184: 5673 + 31 = 5704
Step 185: 5704 + 31 = 5735
Step 186: 5735 + 31 = 5766
Step 187: 5766 + 31 = 5797
Step 188: 5797 + 31 = 5828
Step 189: 5828 + 31 = 5859
Step 190: 5859 + 31 = 5890
Step 191: 5890 + 31 = 5921
Step 192: 5921 + 31 = 5952
Step 193: 5952 + 31 = 5983
Step 194: 5983 + 31 = 6014
Step 195: 6014 + 31 = 6045
Step 196: 6045 + 31 = 6076
Step 197: 6076 + 31 = 6107
Step 198: 6107 + 31 = 6138
Step 199: 6138 + 31 = 6169
Step 200: 6169 + 31 = 6200
Step 201: 6200 + 31 = 6231
Step 202: 6231 + 31 = 6262
Step 203: 6262 + 31 = 6293
Step 204: 6293 + 31 = 6324
Step 205: 6324 + 31 = 6355
Step 206: 6355 + 31 = 6386
Step 207: 6386 + 31 = 6417
Step 208: 6417 + 31 = 6448
Step 209: 6448 + 31 = 6479
Step 210: 6479 + 31 = 6510
Step 211: 6510 + 31 = 6541
Step 212: 6541 + 31 = 6572
Step 213: 6572 + 31 = 6603
Step 214: 6603 + 31 = 6634
Step 215: 6634 + 31 = 6665
Step 216: 6665 + 31 = 6696
Step 217: 6696 + 31 = 6727
Step 218: 6727 + 31 = 6758
Step 219: 6758 + 31 = 6789
Step 220: 6789 + 31 = 6820
Step 221: 6820 + 31 = 6851
Step 222: 6851 + 31 = 6882
Step 223: 6882 + 31 = 6913
Step 224: 6913 + 31 = 6944
Step 225: 6944 + 31 = 6975
Step 226: 6975 + 31 = 7006
Step 227: 7006 + 31 = 7037
Step 228: 7037 + 31 = 7068
Step 229: 7068 + 31 = 7099
Step 230: 7099 + 31 = 7130
Step 231: 7130 + 31 = 7161
Step 232: 7161 + 31 = 7192
Step 233: 7192 + 31 = 7223
Step 234: 7223 + 31 = 7254
Step 235: 7254 + 31 = 7285
Step 236: 7285 + 31 = 7316
Step 237: 7316 + 31 = 7347
Step 238: 7347 + 31 = 7378
Step 239: 7378 + 31 = 7409
Step 240: 7409 + 31 = 7440
Step 241: 7440 + 31 = 7471
Step 242: 7471 + 31 = 7502
Step 243: 7502 + 31 = 7533
Step 244: 7533 + 31 = 7564
Step 245: 7564 + 31 = 7595
Step 246: 7595 + 31 = 7626
Step 247: 7626 + 31 = 7657
Step 248: 7657 + 31 = 7688
Step 249: 7688 + 31 = 7719
Step 250: 7719 + 31 = 7750
Step 251: 7750 + 31 = 7781
Step 252: 7781 + 31 = 7812
Step 253: 7812 + 31 = 7843
Step 254: 7843 + 31 = 7874
Step 255: 7874 + 31 = 7905
Step 256: 7905 + 31 = 7936
Step 257: 7936 + 31 = 7967
Step 258: 7967 + 31 = 7998
Step 259: 7998 + 31 = 8029
Step 260: 8029 + 31 = 8060
Step 261: 8060 + 31 = 8091
Step 262: 8091 + 31 = 8122
Step 263: 8122 + 31 = 8153
Step 264: 8153 + 31 = 8184
Step 265: 8184 + 31 = 8215
Step 266: 8215 + 31 = 8246
Step 267: 8246 + 31 = 8277
Step 268: 8277 + 31 = 8308
Step 269: 8308 + 31 = 8339
Step 270: 8339 + 31 = 8370
Step 271: 8370 + 31 = 8401
Step 272: 8401 + 31 = 8432
Step 273: 8432 + 31 = 8463
Step 274: 8463 + 31 = 8494
Step 275: 8494 + 31 = 8525
Step 276: 8525 + 31 = 8556
Step 277: 8556 + 31 = 8587
Step 278: 8587 + 31 = 8618
Step 279: 8618 + 31 = 8649
Step 280: 8649 + 31 = 8680
Step 281: 8680 + 31 = 8711
Step 282: 8711 + 31 = 8742
Step 283: 8742 + 31 = 8773
Step 284: 8773 + 31 = 8804
Step 285: 8804 + 31 = 8835
Step 286: 8835 + 31 = 8866
Step 287: 8866 + 31 = 8897
Step 288: 8897 + 31 = 8928
Step 289: 8928 + 31 = 8959
Step 290: 8959 + 31 = 8990
Step 291: 8990 + 31 = 9021
Step 292: 9021 + 31 = 9052
Step 293: 9052 + 31 = 9083
Step 294: 9083 + 31 = 9114
Step 295: 9114 + 31 = 9145
Step 296: 9145 + 31 = 9176
Step 297: 9176 + 31 = 9207
Step 298: 9207 + 31 = 9238
Step 299: 9238 + 31 = 9269
Step 300: 9269 + 31 = 9300
Step 301: 9300 + 31 = 9331
Step 302: 9331 + 31 = 9362
Step 303: 9362 + 31 = 9393
Step 304: 9393 + 31 = 9424
Step 305: 9424 + 31 = 9455
Step 306: 9455 + 31 = 9486
Step 307: 9486 + 31 = 9517
Step 308: 9517 + 31 = 9548
Step 309: 9548 + 31 = 9579
Step 310: 9579 + 31 = 9610
Step 311: 9610 + 31 = 9641
Step 312: 9641 + 31 = 9672
Step 313: 9672 + 31 = 9703
Step 314: 9703 + 31 = 9734
Step 315: 9734 + 31 = 9765
Step 316: 9765 + 31 = 9796
Step 317: 9796 + 31 = 9827
Step 318: 9827 + 31 = 9858
Step 319: 9858 + 31 = 9889
Step 320: 9889 + 31 = 9920
Step 321: 9920 + 31 = 9951
Step 322: 9951 + 31 = 9982
Step 323: 9982 + 31 = 10013
Step 324: 10013 + 31 = 10044
Step 325: 10044 + 31 = 10075
Step 326: 10075 + 31 = 10106
Step 327: 10106 + 31 = 10137
Step 328: 10137 + 31 = 10168
Step 329: 10168 + 31 = 10199
Step 330: 10199 + 31 = 10230
Step 331: 10230 + 31 = 10261
Step 332: 10261 + 31 = 10292
Step 333: 10292 + 31 = 10323
Step 334: 10323 + 31 = 10354
Step 335: 10354 + 31 = 10385
Step 336: 10385 + 31 = 10416
Step 337: 10416 + 31 = 10447
Step 338: 10447 + 31 = 10478
Step 339: 10478 + 31 = 10509
Step 340: 10509 + 31 = 10540
Step 341: 10540 + 31 = 10571
Step 342: 10571 + 31 = 10602
Step 343: 10602 + 31 = 10633
Step 344: 10633 + 31 = 10664
Step 345: 10664 + 31 = 10695
Step 346: 10695 + 31 = 10726
Step 347: 10726 + 31 = 10757
Step 348: 10757 + 31 = 10788
Step 349: 10788 + 31 = 10819
Step 350: 10819 + 31 = 10850
Step 351: 10850 + 31 = 10881
Step 352: 10881 + 31 = 10912
Step 353: 10912 + 31 = 10943
Step 354: 10943 + 31 = 10974
Step 355: 10974 + 31 = 11005
Step 356: 11005 + 31 = 11036
Step 357: 11036 + 31 = 11067
Step 358: 11067 + 31 = 11098
Step 359: 11098 + 31 = 11129
Step 360: 11129 + 31 = 11160
Step 361: 11160 + 31 = 11191

So, 31*361 = 11191