Sure thing, let's get straight to it. We start with 715 and we're going to multiply it by 391, which means adding 715 to itself 391 times.
Step 1: 0 + 715 = 715
Step 2: 715 + 715 = 1430
Step 3: 1430 + 715 = 2145
Step 4: 2145 + 715 = 2860
Step 5: 2860 + 715 = 3575
Step 6: 3575 + 715 = 4290
Step 7: 4290 + 715 = 5005
Step 8: 5005 + 715 = 5720
Step 9: 5720 + 715 = 6435
Step 10: 6435 + 715 = 7150
Step 11: 7150 + 715 = 7865
Step 12: 7865 + 715 = 8580
Step 13: 8580 + 715 = 9295
Step 14: 9295 + 715 = 10010
Step 15: 10010 + 715 = 10725
Step 16: 10725 + 715 = 11440
Step 17: 11440 + 715 = 12155
Step 18: 12155 + 715 = 12870
Step 19: 12870 + 715 = 13585
Step 20: 13585 + 715 = 14300
Step 21: 14300 + 715 = 15015
Step 22: 15015 + 715 = 15730
Step 23: 15730 + 715 = 16445
Step 24: 16445 + 715 = 17160
Step 25: 17160 + 715 = 17875
Step 26: 17875 + 715 = 18590
Step 27: 18590 + 715 = 19305
Step 28: 19305 + 715 = 20020
Step 29: 20020 + 715 = 20735
Step 30: 20735 + 715 = 21450
Step 31: 21450 + 715 = 22165
Step 32: 22165 + 715 = 22880
Step 33: 22880 + 715 = 23595
Step 34: 23595 + 715 = 24310
Step 35: 24310 + 715 = 25025
Step 36: 25025 + 715 = 25740
Step 37: 25740 + 715 = 26455
Step 38: 26455 + 715 = 27170
Step 39: 27170 + 715 = 27885
Step 40: 27885 + 715 = 28600
Step 41: 28600 + 715 = 29315
Step 42: 29315 + 715 = 30030
Step 43: 30030 + 715 = 30745
Step 44: 30745 + 715 = 31460
Step 45: 31460 + 715 = 32175
Step 46: 32175 + 715 = 32890
Step 47: 32890 + 715 = 33605
Step 48: 33605 + 715 = 34320
Step 49: 34320 + 715 = 35035
Step 50: 35035 + 715 = 35750
Step 51: 35750 + 715 = 36465
Step 52: 36465 + 715 = 37180
Step 53: 37180 + 715 = 37895
Step 54: 37895 + 715 = 38610
Step 55: 38610 + 715 = 39325
Step 56: 39325 + 715 = 40040
Step 57: 40040 + 715 = 40755
Step 58: 40755 + 715 = 41470
Step 59: 41470 + 715 = 42185
Step 60: 42185 + 715 = 42900
Step 61: 42900 + 715 = 43615
Step 62: 43615 + 715 = 44330
Step 63: 44330 + 715 = 45045
Step 64: 45045 + 715 = 45760
Step 65: 45760 + 715 = 46475
Step 66: 46475 + 715 = 47190
Step 67: 47190 + 715 = 47905
Step 68: 47905 + 715 = 48620
Step 69: 48620 + 715 = 49335
Step 70: 49335 + 715 = 50050
Step 71: 50050 + 715 = 50765
Step 72: 50765 + 715 = 51480
Step 73: 51480 + 715 = 52195
Step 74: 52195 + 715 = 52910
Step 75: 52910 + 715 = 53625
Step 76: 53625 + 715 = 54340
Step 77: 54340 + 715 = 55055
Step 78: 55055 + 715 = 55770
Step 79: 55770 + 715 = 56485
Step 80: 56485 + 715 = 57200
Step 81: 57200 + 715 = 57915
Step 82: 57915 + 715 = 58630
Step 83: 58630 + 715 = 59345
Step 84: 59345 + 715 = 60060
Step 85: 60060 + 715 = 60775
Step 86: 60775 + 715 = 61490
Step 87: 61490 + 715 = 62205
Step 88: 62205 + 715 = 62920
Step 89: 62920 + 715 = 63635
Step 90: 63635 + 715 = 64350
Step 91: 64350 + 715 = 65065
Step 92: 65065 + 715 = 65780
Step 93: 65780 + 715 = 66495
Step 94: 66495 + 715 = 67210
Step 95: 67210 + 715 = 67925
Step 96: 67925 + 715 = 68640
Step 97: 68640 + 715 = 69355
Step 98: 69355 + 715 = 70070
Step 99: 70070 + 715 = 70785
Step 100: 70785 + 715 = 71500
Step 101: 71500 + 715 = 72215
Step 102: 72215 + 715 = 72930
Step 103: 72930 + 715 = 73645
Step 104: 73645 + 715 = 74360
Step 105: 74360 + 715 = 75075
Step 106: 75075 + 715 = 75790
Step 107: 75790 + 715 = 76505
Step 108: 76505 + 715 = 77220
Step 109: 77220 + 715 = 77935
Step 110: 77935 + 715 = 78650
Step 111: 78650 + 715 = 79365
Step 112: 79365 + 715 = 80080
Step 113: 80080 + 715 = 80795
Step 114: 80795 + 715 = 81510
Step 115: 81510 + 715 = 82225
Step 116: 82225 + 715 = 82940
Step 117: 82940 + 715 = 83655
Step 118: 83655 + 715 = 84370
Step 119: 84370 + 715 = 85085
Step 120: 85085 + 715 = 85800
Step 121: 85800 + 715 = 86515
Step 122: 86515 + 715 = 87230
Step 123: 87230 + 715 = 87945
Step 124: 87945 + 715 = 88660
Step 125: 88660 + 715 = 89375
Step 126: 89375 + 715 = 90090
Step 127: 90090 + 715 = 90805
Step 128: 90805 + 715 = 91520
Step 129: 91520 + 715 = 92235
Step 130: 92235 + 715 = 92950
Step 131: 92950 + 715 = 93665
Step 132: 93665 + 715 = 94380
Step 133: 94380 + 715 = 95095
Step 134: 95095 + 715 = 95810
Step 135: 95810 + 715 = 96525
Step 136: 96525 + 715 = 97240
Step 137: 97240 + 715 = 97955
Step 138: 97955 + 715 = 98670
Step 139: 98670 + 715 = 99385
Step 140: 99385 + 715 = 100100
Step 141: 100100 + 715 = 100815
Step 142: 100815 + 715 = 101530
Step 143: 101530 + 715 = 102245
Step 144: 102245 + 715 = 102960
Step 145: 102960 + 715 = 103675
Step 146: 103675 + 715 = 104390
Step 147: 104390 + 715 = 105105
Step 148: 105105 + 715 = 105820
Step 149: 105820 + 715 = 106535
Step 150: 106535 + 715 = 107250
Step 151: 107250 + 715 = 107965
Step 152: 107965 + 715 = 108680
Step 153: 108680 + 715 = 109395
Step 154: 109395 + 715 = 110110
Step 155: 110110 + 715 = 110825
Step 156: 110825 + 715 = 111540
Step 157: 111540 + 715 = 112255
Step 158: 112255 + 715 = 112970
Step 159: 112970 + 715 = 113685
Step 160: 113685 + 715 = 114400
Step 161: 114400 + 715 = 115115
Step 162: 115115 + 715 = 115830
Step 163: 115830 + 715 = 116545
Step 164: 116545 + 715 = 117260
Step 165: 117260 + 715 = 117975
Step 166: 117975 + 715 = 118690
Step 167: 118690 + 715 = 119405
Step 168: 119405 + 715 = 120120
Step 169: 120120 + 715 = 120835
Step 170: 120835 + 715 = 121550
Step 171: 121550 + 715 = 122265
Step 172: 122265 + 715 = 122980
Step 173: 122980 + 715 = 123695
Step 174: 123695 + 715 = 124410
Step 175: 124410 + 715 = 125125
Step 176: 125125 + 715 = 125840
Step 177: 125840 + 715 = 126555
Step 178: 126555 + 715 = 127270
Step 179: 127270 + 715 = 127985
Step 180: 127985 + 715 = 128700
Step 181: 128700 + 715 = 129415
Step 182: 129415 + 715 = 130130
Step 183: 130130 + 715 = 130845
Step 184: 130845 + 715 = 131560
Step 185: 131560 + 715 = 132275
Step 186: 132275 + 715 = 132990
Step 187: 132990 + 715 = 133705
Step 188: 133705 + 715 = 134420
Step 189: 134420 + 715 = 135135
Step 190: 135135 + 715 = 135850
Step 191: 135850 + 715 = 136565
Step 192: 136565 + 715 = 137280
Step 193: 137280 + 715 = 137995
Step 194: 137995 + 715 = 138710
Step 195: 138710 + 715 = 139425
Step 196: 139425 + 715 = 140140
Step 197: 140140 + 715 = 140855
Step 198: 140855 + 715 = 141570
Step 199: 141570 + 715 = 142285
Step 200: 142285 + 715 = 143000
Step 201: 143000 + 715 = 143715
Step 202: 143715 + 715 = 144430
Step 203: 144430 + 715 = 145145
Step 204: 145145 + 715 = 145860
Step 205: 145860 + 715 = 146575
Step 206: 146575 + 715 = 147290
Step 207: 147290 + 715 = 148005
Step 208: 148005 + 715 = 148720
Step 209: 148720 + 715 = 149435
Step 210: 149435 + 715 = 150150
Step 211: 150150 + 715 = 150865
Step 212: 150865 + 715 = 151580
Step 213: 151580 + 715 = 152295
Step 214: 152295 + 715 = 153010
Step 215: 153010 + 715 = 153725
Step 216: 153725 + 715 = 154440
Step 217: 154440 + 715 = 155155
Step 218: 155155 + 715 = 155870
Step 219: 155870 + 715 = 156585
Step 220: 156585 + 715 = 157300
Step 221: 157300 + 715 = 158015
Step 222: 158015 + 715 = 158730
Step 223: 158730 + 715 = 159445
Step 224: 159445 + 715 = 160160
Step 225: 160160 + 715 = 160875
Step 226: 160875 + 715 = 161590
Step 227: 161590 + 715 = 162305
Step 228: 162305 + 715 = 163020
Step 229: 163020 + 715 = 163735
Step 230: 163735 + 715 = 164450
Step 231: 164450 + 715 = 165165
Step 232: 165165 + 715 = 165880
Step 233: 165880 + 715 = 166595
Step 234: 166595 + 715 = 167310
Step 235: 167310 + 715 = 168025
Step 236: 168025 + 715 = 168740
Step 237: 168740 + 715 = 169455
Step 238: 169455 + 715 = 170170
Step 239: 170170 + 715 = 170885
Step 240: 170885 + 715 = 171600
Step 241: 171600 + 715 = 172315
Step 242: 172315 + 715 = 173030
Step 243: 173030 + 715 = 173745
Step 244: 173745 + 715 = 174460
Step 245: 174460 + 715 = 175175
Step 246: 175175 + 715 = 175890
Step 247: 175890 + 715 = 176605
Step 248: 176605 + 715 = 177320
Step 249: 177320 + 715 = 178035
Step 250: 178035 + 715 = 178750
Step 251: 178750 + 715 = 179465
Step 252: 179465 + 715 = 180180
Step 253: 180180 + 715 = 180895
Step 254: 180895 + 715 = 181610
Step 255: 181610 + 715 = 182325
Step 256: 182325 + 715 = 183040
Step 257: 183040 + 715 = 183755
Step 258: 183755 + 715 = 184470
Step 259: 184470 + 715 = 185185
Step 260: 185185 + 715 = 185900
Step 261: 185900 + 715 = 186615
Step 262: 186615 + 715 = 187330
Step 263: 187330 + 715 = 188045
Step 264: 188045 + 715 = 188760
Step 265: 188760 + 715 = 189475
Step 266: 189475 + 715 = 190190
Step 267: 190190 + 715 = 190905
Step 268: 190905 + 715 = 191620
Step 269: 191620 + 715 = 192335
Step 270: 192335 + 715 = 193050
Step 271: 193050 + 715 = 193765
Step 272: 193765 + 715 = 194480
Step 273: 194480 + 715 = 195195
Step 274: 195195 + 715 = 195910
Step 275: 195910 + 715 = 196625
Step 276: 196625 + 715 = 197340
Step 277: 197340 + 715 = 198055
Step 278: 198055 + 715 = 198770
Step 279: 198770 + 715 = 199485
Step 280: 199485 + 715 = 200200
Step 281: 200200 + 715 = 200915
Step 282: 200915 + 715 = 201630
Step 283: 201630 + 715 = 202345
Step 284: 202345 + 715 = 203060
Step 285: 203060 + 715 = 203775
Step 286: 203775 + 715 = 204490
Step 287: 204490 + 715 = 205205
Step 288: 205205 + 715 = 205920
Step 289: 205920 + 715 = 206635
Step 290: 206635 + 715 = 207350
Step 291: 207350 + 715 = 208065
Step 292: 208065 + 715 = 208780
Step 293: 208780 + 715 = 209495
Step 294: 209495 + 715 = 210210
Step 295: 210210 + 715 = 210925
Step 296: 210925 + 715 = 211640
Step 297: 211640 + 715 = 212355
Step 298: 212355 + 715 = 213070
Step 299: 213070 + 715 = 213785
Step 300: 213785 + 715 = 214500
Step 301: 214500 + 715 = 215215
Step 302: 215215 + 715 = 215930
Step 303: 215930 + 715 = 216645
Step 304: 216645 + 715 = 217360
Step 305: 217360 + 715 = 218075
Step 306: 218075 + 715 = 218790
Step 307: 218790 + 715 = 219505
Step 308: 219505 + 715 = 220220
Step 309: 220220 + 715 = 220935
Step 310: 220935 + 715 = 221650
Step 311: 221650 + 715 = 222365
Step 312: 222365 + 715 = 223080
Step 313: 223080 + 715 = 223795
Step 314: 223795 + 715 = 224510
Step 315: 224510 + 715 = 225225
Step 316: 225225 + 715 = 225940
Step 317: 225940 + 715 = 226655
Step 318: 226655 + 715 = 227370
Step 319: 227370 + 715 = 228085
Step 320: 228085 + 715 = 228800
Step 321: 228800 + 715 = 229515
Step 322: 229515 + 715 = 230230
Step 323: 230230 + 715 = 230945
Step 324: 230945 + 715 = 231660
Step 325: 231660 + 715 = 232375
Step 326: 232375 + 715 = 233090
Step 327: 233090 + 715 = 233805
Step 328: 233805 + 715 = 234520
Step 329: 234520 + 715 = 235235
Step 330: 235235 + 715 = 235950
Step 331: 235950 + 715 = 236665
Step 332: 236665 + 715 = 237380
Step 333: 237380 + 715 = 238095
Step 334: 238095 + 715 = 238810
Step 335: 238810 + 715 = 239525
Step 336: 239525 + 715 = 240240
Step 337: 240240 + 715 = 240955
Step 338: 240955 + 715 = 241670
Step 339: 241670 + 715 = 242385
Step 340: 242385 + 715 = 243100
Step 341: 243100 + 715 = 243815
Step 342: 243815 + 715 = 244530
Step 343: 244530 + 715 = 245245
Step 344: 245245 + 715 = 245960
Step 345: 245960 + 715 = 246675
Step 346: 246675 + 715 = 247390
Step 347: 247390 + 715 = 248105
Step 348: 248105 + 715 = 248820
Step 349: 248820 + 715 = 249535
Step 350: 249535 + 715 = 250250
Step 351: 250250 + 715 = 250965
Step 352: 250965 + 715 = 251680
Step 353: 251680 + 715 = 252395
Step 354: 252395 + 715 = 253110
Step 355: 253110 + 715 = 253825
Step 356: 253825 + 715 = 254540
Step 357: 254540 + 715 = 255255
Step 358: 255255 + 715 = 255970
Step 359: 255970 + 715 = 256685
Step 360: 256685 + 715 = 257400
Step 361: 257400 + 715 = 258115
Step 362: 258115 + 715 = 258830
Step 363: 258830 + 715 = 259545
Step 364: 259545 + 715 = 260260
Step 365: 260260 + 715 = 260975
Step 366: 260975 + 715 = 261690
Step 367: 261690 + 715 = 262405
Step 368: 262405 + 715 = 263120
Step 369: 263120 + 715 = 263835
Step 370: 263835 + 715 = 264550
Step 371: 264550 + 715 = 265265
Step 372: 265265 + 715 = 265980
Step 373: 265980 + 715 = 266695
Step 374: 266695 + 715 = 267410
Step 375: 267410 + 715 = 268125
Step 376: 268125 + 715 = 268840
Step 377: 268840 + 715 = 269555
Step 378: 269555 + 715 = 270270
Step 379: 270270 + 715 = 270985
Step 380: 270985 + 715 = 271700
Step 381: 271700 + 715 = 272415
Step 382: 272415 + 715 = 273130
Step 383: 273130 + 715 = 273845
Step 384: 273845 + 715 = 274560
Step 385: 274560 + 715 = 275275
Step 386: 275275 + 715 = 275990
Step 387: 275990 + 715 = 276705
Step 388: 276705 + 715 = 277420
Step 389: 277420 + 715 = 278135
Step 390: 278135 + 715 = 278850
Step 391: 278850 + 715 = 279565

So, 715*391 = 279565