Sure thing! We've got 305 and we're gonna multiply it by 331. That's the same as adding 305 to itself 331 times.
Step 1: 0 + 305 = 305
Step 2: 305 + 305 = 610
Step 3: 610 + 305 = 915
Step 4: 915 + 305 = 1220
Step 5: 1220 + 305 = 1525
Step 6: 1525 + 305 = 1830
Step 7: 1830 + 305 = 2135
Step 8: 2135 + 305 = 2440
Step 9: 2440 + 305 = 2745
Step 10: 2745 + 305 = 3050
Step 11: 3050 + 305 = 3355
Step 12: 3355 + 305 = 3660
Step 13: 3660 + 305 = 3965
Step 14: 3965 + 305 = 4270
Step 15: 4270 + 305 = 4575
Step 16: 4575 + 305 = 4880
Step 17: 4880 + 305 = 5185
Step 18: 5185 + 305 = 5490
Step 19: 5490 + 305 = 5795
Step 20: 5795 + 305 = 6100
Step 21: 6100 + 305 = 6405
Step 22: 6405 + 305 = 6710
Step 23: 6710 + 305 = 7015
Step 24: 7015 + 305 = 7320
Step 25: 7320 + 305 = 7625
Step 26: 7625 + 305 = 7930
Step 27: 7930 + 305 = 8235
Step 28: 8235 + 305 = 8540
Step 29: 8540 + 305 = 8845
Step 30: 8845 + 305 = 9150
Step 31: 9150 + 305 = 9455
Step 32: 9455 + 305 = 9760
Step 33: 9760 + 305 = 10065
Step 34: 10065 + 305 = 10370
Step 35: 10370 + 305 = 10675
Step 36: 10675 + 305 = 10980
Step 37: 10980 + 305 = 11285
Step 38: 11285 + 305 = 11590
Step 39: 11590 + 305 = 11895
Step 40: 11895 + 305 = 12200
Step 41: 12200 + 305 = 12505
Step 42: 12505 + 305 = 12810
Step 43: 12810 + 305 = 13115
Step 44: 13115 + 305 = 13420
Step 45: 13420 + 305 = 13725
Step 46: 13725 + 305 = 14030
Step 47: 14030 + 305 = 14335
Step 48: 14335 + 305 = 14640
Step 49: 14640 + 305 = 14945
Step 50: 14945 + 305 = 15250
Step 51: 15250 + 305 = 15555
Step 52: 15555 + 305 = 15860
Step 53: 15860 + 305 = 16165
Step 54: 16165 + 305 = 16470
Step 55: 16470 + 305 = 16775
Step 56: 16775 + 305 = 17080
Step 57: 17080 + 305 = 17385
Step 58: 17385 + 305 = 17690
Step 59: 17690 + 305 = 17995
Step 60: 17995 + 305 = 18300
Step 61: 18300 + 305 = 18605
Step 62: 18605 + 305 = 18910
Step 63: 18910 + 305 = 19215
Step 64: 19215 + 305 = 19520
Step 65: 19520 + 305 = 19825
Step 66: 19825 + 305 = 20130
Step 67: 20130 + 305 = 20435
Step 68: 20435 + 305 = 20740
Step 69: 20740 + 305 = 21045
Step 70: 21045 + 305 = 21350
Step 71: 21350 + 305 = 21655
Step 72: 21655 + 305 = 21960
Step 73: 21960 + 305 = 22265
Step 74: 22265 + 305 = 22570
Step 75: 22570 + 305 = 22875
Step 76: 22875 + 305 = 23180
Step 77: 23180 + 305 = 23485
Step 78: 23485 + 305 = 23790
Step 79: 23790 + 305 = 24095
Step 80: 24095 + 305 = 24400
Step 81: 24400 + 305 = 24705
Step 82: 24705 + 305 = 25010
Step 83: 25010 + 305 = 25315
Step 84: 25315 + 305 = 25620
Step 85: 25620 + 305 = 25925
Step 86: 25925 + 305 = 26230
Step 87: 26230 + 305 = 26535
Step 88: 26535 + 305 = 26840
Step 89: 26840 + 305 = 27145
Step 90: 27145 + 305 = 27450
Step 91: 27450 + 305 = 27755
Step 92: 27755 + 305 = 28060
Step 93: 28060 + 305 = 28365
Step 94: 28365 + 305 = 28670
Step 95: 28670 + 305 = 28975
Step 96: 28975 + 305 = 29280
Step 97: 29280 + 305 = 29585
Step 98: 29585 + 305 = 29890
Step 99: 29890 + 305 = 30195
Step 100: 30195 + 305 = 30500
Step 101: 30500 + 305 = 30805
Step 102: 30805 + 305 = 31110
Step 103: 31110 + 305 = 31415
Step 104: 31415 + 305 = 31720
Step 105: 31720 + 305 = 32025
Step 106: 32025 + 305 = 32330
Step 107: 32330 + 305 = 32635
Step 108: 32635 + 305 = 32940
Step 109: 32940 + 305 = 33245
Step 110: 33245 + 305 = 33550
Step 111: 33550 + 305 = 33855
Step 112: 33855 + 305 = 34160
Step 113: 34160 + 305 = 34465
Step 114: 34465 + 305 = 34770
Step 115: 34770 + 305 = 35075
Step 116: 35075 + 305 = 35380
Step 117: 35380 + 305 = 35685
Step 118: 35685 + 305 = 35990
Step 119: 35990 + 305 = 36295
Step 120: 36295 + 305 = 36600
Step 121: 36600 + 305 = 36905
Step 122: 36905 + 305 = 37210
Step 123: 37210 + 305 = 37515
Step 124: 37515 + 305 = 37820
Step 125: 37820 + 305 = 38125
Step 126: 38125 + 305 = 38430
Step 127: 38430 + 305 = 38735
Step 128: 38735 + 305 = 39040
Step 129: 39040 + 305 = 39345
Step 130: 39345 + 305 = 39650
Step 131: 39650 + 305 = 39955
Step 132: 39955 + 305 = 40260
Step 133: 40260 + 305 = 40565
Step 134: 40565 + 305 = 40870
Step 135: 40870 + 305 = 41175
Step 136: 41175 + 305 = 41480
Step 137: 41480 + 305 = 41785
Step 138: 41785 + 305 = 42090
Step 139: 42090 + 305 = 42395
Step 140: 42395 + 305 = 42700
Step 141: 42700 + 305 = 43005
Step 142: 43005 + 305 = 43310
Step 143: 43310 + 305 = 43615
Step 144: 43615 + 305 = 43920
Step 145: 43920 + 305 = 44225
Step 146: 44225 + 305 = 44530
Step 147: 44530 + 305 = 44835
Step 148: 44835 + 305 = 45140
Step 149: 45140 + 305 = 45445
Step 150: 45445 + 305 = 45750
Step 151: 45750 + 305 = 46055
Step 152: 46055 + 305 = 46360
Step 153: 46360 + 305 = 46665
Step 154: 46665 + 305 = 46970
Step 155: 46970 + 305 = 47275
Step 156: 47275 + 305 = 47580
Step 157: 47580 + 305 = 47885
Step 158: 47885 + 305 = 48190
Step 159: 48190 + 305 = 48495
Step 160: 48495 + 305 = 48800
Step 161: 48800 + 305 = 49105
Step 162: 49105 + 305 = 49410
Step 163: 49410 + 305 = 49715
Step 164: 49715 + 305 = 50020
Step 165: 50020 + 305 = 50325
Step 166: 50325 + 305 = 50630
Step 167: 50630 + 305 = 50935
Step 168: 50935 + 305 = 51240
Step 169: 51240 + 305 = 51545
Step 170: 51545 + 305 = 51850
Step 171: 51850 + 305 = 52155
Step 172: 52155 + 305 = 52460
Step 173: 52460 + 305 = 52765
Step 174: 52765 + 305 = 53070
Step 175: 53070 + 305 = 53375
Step 176: 53375 + 305 = 53680
Step 177: 53680 + 305 = 53985
Step 178: 53985 + 305 = 54290
Step 179: 54290 + 305 = 54595
Step 180: 54595 + 305 = 54900
Step 181: 54900 + 305 = 55205
Step 182: 55205 + 305 = 55510
Step 183: 55510 + 305 = 55815
Step 184: 55815 + 305 = 56120
Step 185: 56120 + 305 = 56425
Step 186: 56425 + 305 = 56730
Step 187: 56730 + 305 = 57035
Step 188: 57035 + 305 = 57340
Step 189: 57340 + 305 = 57645
Step 190: 57645 + 305 = 57950
Step 191: 57950 + 305 = 58255
Step 192: 58255 + 305 = 58560
Step 193: 58560 + 305 = 58865
Step 194: 58865 + 305 = 59170
Step 195: 59170 + 305 = 59475
Step 196: 59475 + 305 = 59780
Step 197: 59780 + 305 = 60085
Step 198: 60085 + 305 = 60390
Step 199: 60390 + 305 = 60695
Step 200: 60695 + 305 = 61000
Step 201: 61000 + 305 = 61305
Step 202: 61305 + 305 = 61610
Step 203: 61610 + 305 = 61915
Step 204: 61915 + 305 = 62220
Step 205: 62220 + 305 = 62525
Step 206: 62525 + 305 = 62830
Step 207: 62830 + 305 = 63135
Step 208: 63135 + 305 = 63440
Step 209: 63440 + 305 = 63745
Step 210: 63745 + 305 = 64050
Step 211: 64050 + 305 = 64355
Step 212: 64355 + 305 = 64660
Step 213: 64660 + 305 = 64965
Step 214: 64965 + 305 = 65270
Step 215: 65270 + 305 = 65575
Step 216: 65575 + 305 = 65880
Step 217: 65880 + 305 = 66185
Step 218: 66185 + 305 = 66490
Step 219: 66490 + 305 = 66795
Step 220: 66795 + 305 = 67100
Step 221: 67100 + 305 = 67405
Step 222: 67405 + 305 = 67710
Step 223: 67710 + 305 = 68015
Step 224: 68015 + 305 = 68320
Step 225: 68320 + 305 = 68625
Step 226: 68625 + 305 = 68930
Step 227: 68930 + 305 = 69235
Step 228: 69235 + 305 = 69540
Step 229: 69540 + 305 = 69845
Step 230: 69845 + 305 = 70150
Step 231: 70150 + 305 = 70455
Step 232: 70455 + 305 = 70760
Step 233: 70760 + 305 = 71065
Step 234: 71065 + 305 = 71370
Step 235: 71370 + 305 = 71675
Step 236: 71675 + 305 = 71980
Step 237: 71980 + 305 = 72285
Step 238: 72285 + 305 = 72590
Step 239: 72590 + 305 = 72895
Step 240: 72895 + 305 = 73200
Step 241: 73200 + 305 = 73505
Step 242: 73505 + 305 = 73810
Step 243: 73810 + 305 = 74115
Step 244: 74115 + 305 = 74420
Step 245: 74420 + 305 = 74725
Step 246: 74725 + 305 = 75030
Step 247: 75030 + 305 = 75335
Step 248: 75335 + 305 = 75640
Step 249: 75640 + 305 = 75945
Step 250: 75945 + 305 = 76250
Step 251: 76250 + 305 = 76555
Step 252: 76555 + 305 = 76860
Step 253: 76860 + 305 = 77165
Step 254: 77165 + 305 = 77470
Step 255: 77470 + 305 = 77775
Step 256: 77775 + 305 = 78080
Step 257: 78080 + 305 = 78385
Step 258: 78385 + 305 = 78690
Step 259: 78690 + 305 = 78995
Step 260: 78995 + 305 = 79300
Step 261: 79300 + 305 = 79605
Step 262: 79605 + 305 = 79910
Step 263: 79910 + 305 = 80215
Step 264: 80215 + 305 = 80520
Step 265: 80520 + 305 = 80825
Step 266: 80825 + 305 = 81130
Step 267: 81130 + 305 = 81435
Step 268: 81435 + 305 = 81740
Step 269: 81740 + 305 = 82045
Step 270: 82045 + 305 = 82350
Step 271: 82350 + 305 = 82655
Step 272: 82655 + 305 = 82960
Step 273: 82960 + 305 = 83265
Step 274: 83265 + 305 = 83570
Step 275: 83570 + 305 = 83875
Step 276: 83875 + 305 = 84180
Step 277: 84180 + 305 = 84485
Step 278: 84485 + 305 = 84790
Step 279: 84790 + 305 = 85095
Step 280: 85095 + 305 = 85400
Step 281: 85400 + 305 = 85705
Step 282: 85705 + 305 = 86010
Step 283: 86010 + 305 = 86315
Step 284: 86315 + 305 = 86620
Step 285: 86620 + 305 = 86925
Step 286: 86925 + 305 = 87230
Step 287: 87230 + 305 = 87535
Step 288: 87535 + 305 = 87840
Step 289: 87840 + 305 = 88145
Step 290: 88145 + 305 = 88450
Step 291: 88450 + 305 = 88755
Step 292: 88755 + 305 = 89060
Step 293: 89060 + 305 = 89365
Step 294: 89365 + 305 = 89670
Step 295: 89670 + 305 = 89975
Step 296: 89975 + 305 = 90280
Step 297: 90280 + 305 = 90585
Step 298: 90585 + 305 = 90890
Step 299: 90890 + 305 = 91195
Step 300: 91195 + 305 = 91500
Step 301: 91500 + 305 = 91805
Step 302: 91805 + 305 = 92110
Step 303: 92110 + 305 = 92415
Step 304: 92415 + 305 = 92720
Step 305: 92720 + 305 = 93025
Step 306: 93025 + 305 = 93330
Step 307: 93330 + 305 = 93635
Step 308: 93635 + 305 = 93940
Step 309: 93940 + 305 = 94245
Step 310: 94245 + 305 = 94550
Step 311: 94550 + 305 = 94855
Step 312: 94855 + 305 = 95160
Step 313: 95160 + 305 = 95465
Step 314: 95465 + 305 = 95770
Step 315: 95770 + 305 = 96075
Step 316: 96075 + 305 = 96380
Step 317: 96380 + 305 = 96685
Step 318: 96685 + 305 = 96990
Step 319: 96990 + 305 = 97295
Step 320: 97295 + 305 = 97600
Step 321: 97600 + 305 = 97905
Step 322: 97905 + 305 = 98210
Step 323: 98210 + 305 = 98515
Step 324: 98515 + 305 = 98820
Step 325: 98820 + 305 = 99125
Step 326: 99125 + 305 = 99430
Step 327: 99430 + 305 = 99735
Step 328: 99735 + 305 = 100040
Step 329: 100040 + 305 = 100345
Step 330: 100345 + 305 = 100650
Step 331: 100650 + 305 = 100955

So, 305*331 = 100955