Sure thing! We've got 355 and we're gonna multiply it by 407. That's the same as adding 355 to itself 407 times.
Step 1: 0 + 355 = 355
Step 2: 355 + 355 = 710
Step 3: 710 + 355 = 1065
Step 4: 1065 + 355 = 1420
Step 5: 1420 + 355 = 1775
Step 6: 1775 + 355 = 2130
Step 7: 2130 + 355 = 2485
Step 8: 2485 + 355 = 2840
Step 9: 2840 + 355 = 3195
Step 10: 3195 + 355 = 3550
Step 11: 3550 + 355 = 3905
Step 12: 3905 + 355 = 4260
Step 13: 4260 + 355 = 4615
Step 14: 4615 + 355 = 4970
Step 15: 4970 + 355 = 5325
Step 16: 5325 + 355 = 5680
Step 17: 5680 + 355 = 6035
Step 18: 6035 + 355 = 6390
Step 19: 6390 + 355 = 6745
Step 20: 6745 + 355 = 7100
Step 21: 7100 + 355 = 7455
Step 22: 7455 + 355 = 7810
Step 23: 7810 + 355 = 8165
Step 24: 8165 + 355 = 8520
Step 25: 8520 + 355 = 8875
Step 26: 8875 + 355 = 9230
Step 27: 9230 + 355 = 9585
Step 28: 9585 + 355 = 9940
Step 29: 9940 + 355 = 10295
Step 30: 10295 + 355 = 10650
Step 31: 10650 + 355 = 11005
Step 32: 11005 + 355 = 11360
Step 33: 11360 + 355 = 11715
Step 34: 11715 + 355 = 12070
Step 35: 12070 + 355 = 12425
Step 36: 12425 + 355 = 12780
Step 37: 12780 + 355 = 13135
Step 38: 13135 + 355 = 13490
Step 39: 13490 + 355 = 13845
Step 40: 13845 + 355 = 14200
Step 41: 14200 + 355 = 14555
Step 42: 14555 + 355 = 14910
Step 43: 14910 + 355 = 15265
Step 44: 15265 + 355 = 15620
Step 45: 15620 + 355 = 15975
Step 46: 15975 + 355 = 16330
Step 47: 16330 + 355 = 16685
Step 48: 16685 + 355 = 17040
Step 49: 17040 + 355 = 17395
Step 50: 17395 + 355 = 17750
Step 51: 17750 + 355 = 18105
Step 52: 18105 + 355 = 18460
Step 53: 18460 + 355 = 18815
Step 54: 18815 + 355 = 19170
Step 55: 19170 + 355 = 19525
Step 56: 19525 + 355 = 19880
Step 57: 19880 + 355 = 20235
Step 58: 20235 + 355 = 20590
Step 59: 20590 + 355 = 20945
Step 60: 20945 + 355 = 21300
Step 61: 21300 + 355 = 21655
Step 62: 21655 + 355 = 22010
Step 63: 22010 + 355 = 22365
Step 64: 22365 + 355 = 22720
Step 65: 22720 + 355 = 23075
Step 66: 23075 + 355 = 23430
Step 67: 23430 + 355 = 23785
Step 68: 23785 + 355 = 24140
Step 69: 24140 + 355 = 24495
Step 70: 24495 + 355 = 24850
Step 71: 24850 + 355 = 25205
Step 72: 25205 + 355 = 25560
Step 73: 25560 + 355 = 25915
Step 74: 25915 + 355 = 26270
Step 75: 26270 + 355 = 26625
Step 76: 26625 + 355 = 26980
Step 77: 26980 + 355 = 27335
Step 78: 27335 + 355 = 27690
Step 79: 27690 + 355 = 28045
Step 80: 28045 + 355 = 28400
Step 81: 28400 + 355 = 28755
Step 82: 28755 + 355 = 29110
Step 83: 29110 + 355 = 29465
Step 84: 29465 + 355 = 29820
Step 85: 29820 + 355 = 30175
Step 86: 30175 + 355 = 30530
Step 87: 30530 + 355 = 30885
Step 88: 30885 + 355 = 31240
Step 89: 31240 + 355 = 31595
Step 90: 31595 + 355 = 31950
Step 91: 31950 + 355 = 32305
Step 92: 32305 + 355 = 32660
Step 93: 32660 + 355 = 33015
Step 94: 33015 + 355 = 33370
Step 95: 33370 + 355 = 33725
Step 96: 33725 + 355 = 34080
Step 97: 34080 + 355 = 34435
Step 98: 34435 + 355 = 34790
Step 99: 34790 + 355 = 35145
Step 100: 35145 + 355 = 35500
Step 101: 35500 + 355 = 35855
Step 102: 35855 + 355 = 36210
Step 103: 36210 + 355 = 36565
Step 104: 36565 + 355 = 36920
Step 105: 36920 + 355 = 37275
Step 106: 37275 + 355 = 37630
Step 107: 37630 + 355 = 37985
Step 108: 37985 + 355 = 38340
Step 109: 38340 + 355 = 38695
Step 110: 38695 + 355 = 39050
Step 111: 39050 + 355 = 39405
Step 112: 39405 + 355 = 39760
Step 113: 39760 + 355 = 40115
Step 114: 40115 + 355 = 40470
Step 115: 40470 + 355 = 40825
Step 116: 40825 + 355 = 41180
Step 117: 41180 + 355 = 41535
Step 118: 41535 + 355 = 41890
Step 119: 41890 + 355 = 42245
Step 120: 42245 + 355 = 42600
Step 121: 42600 + 355 = 42955
Step 122: 42955 + 355 = 43310
Step 123: 43310 + 355 = 43665
Step 124: 43665 + 355 = 44020
Step 125: 44020 + 355 = 44375
Step 126: 44375 + 355 = 44730
Step 127: 44730 + 355 = 45085
Step 128: 45085 + 355 = 45440
Step 129: 45440 + 355 = 45795
Step 130: 45795 + 355 = 46150
Step 131: 46150 + 355 = 46505
Step 132: 46505 + 355 = 46860
Step 133: 46860 + 355 = 47215
Step 134: 47215 + 355 = 47570
Step 135: 47570 + 355 = 47925
Step 136: 47925 + 355 = 48280
Step 137: 48280 + 355 = 48635
Step 138: 48635 + 355 = 48990
Step 139: 48990 + 355 = 49345
Step 140: 49345 + 355 = 49700
Step 141: 49700 + 355 = 50055
Step 142: 50055 + 355 = 50410
Step 143: 50410 + 355 = 50765
Step 144: 50765 + 355 = 51120
Step 145: 51120 + 355 = 51475
Step 146: 51475 + 355 = 51830
Step 147: 51830 + 355 = 52185
Step 148: 52185 + 355 = 52540
Step 149: 52540 + 355 = 52895
Step 150: 52895 + 355 = 53250
Step 151: 53250 + 355 = 53605
Step 152: 53605 + 355 = 53960
Step 153: 53960 + 355 = 54315
Step 154: 54315 + 355 = 54670
Step 155: 54670 + 355 = 55025
Step 156: 55025 + 355 = 55380
Step 157: 55380 + 355 = 55735
Step 158: 55735 + 355 = 56090
Step 159: 56090 + 355 = 56445
Step 160: 56445 + 355 = 56800
Step 161: 56800 + 355 = 57155
Step 162: 57155 + 355 = 57510
Step 163: 57510 + 355 = 57865
Step 164: 57865 + 355 = 58220
Step 165: 58220 + 355 = 58575
Step 166: 58575 + 355 = 58930
Step 167: 58930 + 355 = 59285
Step 168: 59285 + 355 = 59640
Step 169: 59640 + 355 = 59995
Step 170: 59995 + 355 = 60350
Step 171: 60350 + 355 = 60705
Step 172: 60705 + 355 = 61060
Step 173: 61060 + 355 = 61415
Step 174: 61415 + 355 = 61770
Step 175: 61770 + 355 = 62125
Step 176: 62125 + 355 = 62480
Step 177: 62480 + 355 = 62835
Step 178: 62835 + 355 = 63190
Step 179: 63190 + 355 = 63545
Step 180: 63545 + 355 = 63900
Step 181: 63900 + 355 = 64255
Step 182: 64255 + 355 = 64610
Step 183: 64610 + 355 = 64965
Step 184: 64965 + 355 = 65320
Step 185: 65320 + 355 = 65675
Step 186: 65675 + 355 = 66030
Step 187: 66030 + 355 = 66385
Step 188: 66385 + 355 = 66740
Step 189: 66740 + 355 = 67095
Step 190: 67095 + 355 = 67450
Step 191: 67450 + 355 = 67805
Step 192: 67805 + 355 = 68160
Step 193: 68160 + 355 = 68515
Step 194: 68515 + 355 = 68870
Step 195: 68870 + 355 = 69225
Step 196: 69225 + 355 = 69580
Step 197: 69580 + 355 = 69935
Step 198: 69935 + 355 = 70290
Step 199: 70290 + 355 = 70645
Step 200: 70645 + 355 = 71000
Step 201: 71000 + 355 = 71355
Step 202: 71355 + 355 = 71710
Step 203: 71710 + 355 = 72065
Step 204: 72065 + 355 = 72420
Step 205: 72420 + 355 = 72775
Step 206: 72775 + 355 = 73130
Step 207: 73130 + 355 = 73485
Step 208: 73485 + 355 = 73840
Step 209: 73840 + 355 = 74195
Step 210: 74195 + 355 = 74550
Step 211: 74550 + 355 = 74905
Step 212: 74905 + 355 = 75260
Step 213: 75260 + 355 = 75615
Step 214: 75615 + 355 = 75970
Step 215: 75970 + 355 = 76325
Step 216: 76325 + 355 = 76680
Step 217: 76680 + 355 = 77035
Step 218: 77035 + 355 = 77390
Step 219: 77390 + 355 = 77745
Step 220: 77745 + 355 = 78100
Step 221: 78100 + 355 = 78455
Step 222: 78455 + 355 = 78810
Step 223: 78810 + 355 = 79165
Step 224: 79165 + 355 = 79520
Step 225: 79520 + 355 = 79875
Step 226: 79875 + 355 = 80230
Step 227: 80230 + 355 = 80585
Step 228: 80585 + 355 = 80940
Step 229: 80940 + 355 = 81295
Step 230: 81295 + 355 = 81650
Step 231: 81650 + 355 = 82005
Step 232: 82005 + 355 = 82360
Step 233: 82360 + 355 = 82715
Step 234: 82715 + 355 = 83070
Step 235: 83070 + 355 = 83425
Step 236: 83425 + 355 = 83780
Step 237: 83780 + 355 = 84135
Step 238: 84135 + 355 = 84490
Step 239: 84490 + 355 = 84845
Step 240: 84845 + 355 = 85200
Step 241: 85200 + 355 = 85555
Step 242: 85555 + 355 = 85910
Step 243: 85910 + 355 = 86265
Step 244: 86265 + 355 = 86620
Step 245: 86620 + 355 = 86975
Step 246: 86975 + 355 = 87330
Step 247: 87330 + 355 = 87685
Step 248: 87685 + 355 = 88040
Step 249: 88040 + 355 = 88395
Step 250: 88395 + 355 = 88750
Step 251: 88750 + 355 = 89105
Step 252: 89105 + 355 = 89460
Step 253: 89460 + 355 = 89815
Step 254: 89815 + 355 = 90170
Step 255: 90170 + 355 = 90525
Step 256: 90525 + 355 = 90880
Step 257: 90880 + 355 = 91235
Step 258: 91235 + 355 = 91590
Step 259: 91590 + 355 = 91945
Step 260: 91945 + 355 = 92300
Step 261: 92300 + 355 = 92655
Step 262: 92655 + 355 = 93010
Step 263: 93010 + 355 = 93365
Step 264: 93365 + 355 = 93720
Step 265: 93720 + 355 = 94075
Step 266: 94075 + 355 = 94430
Step 267: 94430 + 355 = 94785
Step 268: 94785 + 355 = 95140
Step 269: 95140 + 355 = 95495
Step 270: 95495 + 355 = 95850
Step 271: 95850 + 355 = 96205
Step 272: 96205 + 355 = 96560
Step 273: 96560 + 355 = 96915
Step 274: 96915 + 355 = 97270
Step 275: 97270 + 355 = 97625
Step 276: 97625 + 355 = 97980
Step 277: 97980 + 355 = 98335
Step 278: 98335 + 355 = 98690
Step 279: 98690 + 355 = 99045
Step 280: 99045 + 355 = 99400
Step 281: 99400 + 355 = 99755
Step 282: 99755 + 355 = 100110
Step 283: 100110 + 355 = 100465
Step 284: 100465 + 355 = 100820
Step 285: 100820 + 355 = 101175
Step 286: 101175 + 355 = 101530
Step 287: 101530 + 355 = 101885
Step 288: 101885 + 355 = 102240
Step 289: 102240 + 355 = 102595
Step 290: 102595 + 355 = 102950
Step 291: 102950 + 355 = 103305
Step 292: 103305 + 355 = 103660
Step 293: 103660 + 355 = 104015
Step 294: 104015 + 355 = 104370
Step 295: 104370 + 355 = 104725
Step 296: 104725 + 355 = 105080
Step 297: 105080 + 355 = 105435
Step 298: 105435 + 355 = 105790
Step 299: 105790 + 355 = 106145
Step 300: 106145 + 355 = 106500
Step 301: 106500 + 355 = 106855
Step 302: 106855 + 355 = 107210
Step 303: 107210 + 355 = 107565
Step 304: 107565 + 355 = 107920
Step 305: 107920 + 355 = 108275
Step 306: 108275 + 355 = 108630
Step 307: 108630 + 355 = 108985
Step 308: 108985 + 355 = 109340
Step 309: 109340 + 355 = 109695
Step 310: 109695 + 355 = 110050
Step 311: 110050 + 355 = 110405
Step 312: 110405 + 355 = 110760
Step 313: 110760 + 355 = 111115
Step 314: 111115 + 355 = 111470
Step 315: 111470 + 355 = 111825
Step 316: 111825 + 355 = 112180
Step 317: 112180 + 355 = 112535
Step 318: 112535 + 355 = 112890
Step 319: 112890 + 355 = 113245
Step 320: 113245 + 355 = 113600
Step 321: 113600 + 355 = 113955
Step 322: 113955 + 355 = 114310
Step 323: 114310 + 355 = 114665
Step 324: 114665 + 355 = 115020
Step 325: 115020 + 355 = 115375
Step 326: 115375 + 355 = 115730
Step 327: 115730 + 355 = 116085
Step 328: 116085 + 355 = 116440
Step 329: 116440 + 355 = 116795
Step 330: 116795 + 355 = 117150
Step 331: 117150 + 355 = 117505
Step 332: 117505 + 355 = 117860
Step 333: 117860 + 355 = 118215
Step 334: 118215 + 355 = 118570
Step 335: 118570 + 355 = 118925
Step 336: 118925 + 355 = 119280
Step 337: 119280 + 355 = 119635
Step 338: 119635 + 355 = 119990
Step 339: 119990 + 355 = 120345
Step 340: 120345 + 355 = 120700
Step 341: 120700 + 355 = 121055
Step 342: 121055 + 355 = 121410
Step 343: 121410 + 355 = 121765
Step 344: 121765 + 355 = 122120
Step 345: 122120 + 355 = 122475
Step 346: 122475 + 355 = 122830
Step 347: 122830 + 355 = 123185
Step 348: 123185 + 355 = 123540
Step 349: 123540 + 355 = 123895
Step 350: 123895 + 355 = 124250
Step 351: 124250 + 355 = 124605
Step 352: 124605 + 355 = 124960
Step 353: 124960 + 355 = 125315
Step 354: 125315 + 355 = 125670
Step 355: 125670 + 355 = 126025
Step 356: 126025 + 355 = 126380
Step 357: 126380 + 355 = 126735
Step 358: 126735 + 355 = 127090
Step 359: 127090 + 355 = 127445
Step 360: 127445 + 355 = 127800
Step 361: 127800 + 355 = 128155
Step 362: 128155 + 355 = 128510
Step 363: 128510 + 355 = 128865
Step 364: 128865 + 355 = 129220
Step 365: 129220 + 355 = 129575
Step 366: 129575 + 355 = 129930
Step 367: 129930 + 355 = 130285
Step 368: 130285 + 355 = 130640
Step 369: 130640 + 355 = 130995
Step 370: 130995 + 355 = 131350
Step 371: 131350 + 355 = 131705
Step 372: 131705 + 355 = 132060
Step 373: 132060 + 355 = 132415
Step 374: 132415 + 355 = 132770
Step 375: 132770 + 355 = 133125
Step 376: 133125 + 355 = 133480
Step 377: 133480 + 355 = 133835
Step 378: 133835 + 355 = 134190
Step 379: 134190 + 355 = 134545
Step 380: 134545 + 355 = 134900
Step 381: 134900 + 355 = 135255
Step 382: 135255 + 355 = 135610
Step 383: 135610 + 355 = 135965
Step 384: 135965 + 355 = 136320
Step 385: 136320 + 355 = 136675
Step 386: 136675 + 355 = 137030
Step 387: 137030 + 355 = 137385
Step 388: 137385 + 355 = 137740
Step 389: 137740 + 355 = 138095
Step 390: 138095 + 355 = 138450
Step 391: 138450 + 355 = 138805
Step 392: 138805 + 355 = 139160
Step 393: 139160 + 355 = 139515
Step 394: 139515 + 355 = 139870
Step 395: 139870 + 355 = 140225
Step 396: 140225 + 355 = 140580
Step 397: 140580 + 355 = 140935
Step 398: 140935 + 355 = 141290
Step 399: 141290 + 355 = 141645
Step 400: 141645 + 355 = 142000
Step 401: 142000 + 355 = 142355
Step 402: 142355 + 355 = 142710
Step 403: 142710 + 355 = 143065
Step 404: 143065 + 355 = 143420
Step 405: 143420 + 355 = 143775
Step 406: 143775 + 355 = 144130
Step 407: 144130 + 355 = 144485

So, 355*407 = 144485