Alright, let's solve this math problem step by step. First, we have the number 915. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 398. So, we're going to take the number 915 and add it to itself 398 times.
Step 1: 0 + 915 = 915
Step 2: 915 + 915 = 1830
Step 3: 1830 + 915 = 2745
Step 4: 2745 + 915 = 3660
Step 5: 3660 + 915 = 4575
Step 6: 4575 + 915 = 5490
Step 7: 5490 + 915 = 6405
Step 8: 6405 + 915 = 7320
Step 9: 7320 + 915 = 8235
Step 10: 8235 + 915 = 9150
Step 11: 9150 + 915 = 10065
Step 12: 10065 + 915 = 10980
Step 13: 10980 + 915 = 11895
Step 14: 11895 + 915 = 12810
Step 15: 12810 + 915 = 13725
Step 16: 13725 + 915 = 14640
Step 17: 14640 + 915 = 15555
Step 18: 15555 + 915 = 16470
Step 19: 16470 + 915 = 17385
Step 20: 17385 + 915 = 18300
Step 21: 18300 + 915 = 19215
Step 22: 19215 + 915 = 20130
Step 23: 20130 + 915 = 21045
Step 24: 21045 + 915 = 21960
Step 25: 21960 + 915 = 22875
Step 26: 22875 + 915 = 23790
Step 27: 23790 + 915 = 24705
Step 28: 24705 + 915 = 25620
Step 29: 25620 + 915 = 26535
Step 30: 26535 + 915 = 27450
Step 31: 27450 + 915 = 28365
Step 32: 28365 + 915 = 29280
Step 33: 29280 + 915 = 30195
Step 34: 30195 + 915 = 31110
Step 35: 31110 + 915 = 32025
Step 36: 32025 + 915 = 32940
Step 37: 32940 + 915 = 33855
Step 38: 33855 + 915 = 34770
Step 39: 34770 + 915 = 35685
Step 40: 35685 + 915 = 36600
Step 41: 36600 + 915 = 37515
Step 42: 37515 + 915 = 38430
Step 43: 38430 + 915 = 39345
Step 44: 39345 + 915 = 40260
Step 45: 40260 + 915 = 41175
Step 46: 41175 + 915 = 42090
Step 47: 42090 + 915 = 43005
Step 48: 43005 + 915 = 43920
Step 49: 43920 + 915 = 44835
Step 50: 44835 + 915 = 45750
Step 51: 45750 + 915 = 46665
Step 52: 46665 + 915 = 47580
Step 53: 47580 + 915 = 48495
Step 54: 48495 + 915 = 49410
Step 55: 49410 + 915 = 50325
Step 56: 50325 + 915 = 51240
Step 57: 51240 + 915 = 52155
Step 58: 52155 + 915 = 53070
Step 59: 53070 + 915 = 53985
Step 60: 53985 + 915 = 54900
Step 61: 54900 + 915 = 55815
Step 62: 55815 + 915 = 56730
Step 63: 56730 + 915 = 57645
Step 64: 57645 + 915 = 58560
Step 65: 58560 + 915 = 59475
Step 66: 59475 + 915 = 60390
Step 67: 60390 + 915 = 61305
Step 68: 61305 + 915 = 62220
Step 69: 62220 + 915 = 63135
Step 70: 63135 + 915 = 64050
Step 71: 64050 + 915 = 64965
Step 72: 64965 + 915 = 65880
Step 73: 65880 + 915 = 66795
Step 74: 66795 + 915 = 67710
Step 75: 67710 + 915 = 68625
Step 76: 68625 + 915 = 69540
Step 77: 69540 + 915 = 70455
Step 78: 70455 + 915 = 71370
Step 79: 71370 + 915 = 72285
Step 80: 72285 + 915 = 73200
Step 81: 73200 + 915 = 74115
Step 82: 74115 + 915 = 75030
Step 83: 75030 + 915 = 75945
Step 84: 75945 + 915 = 76860
Step 85: 76860 + 915 = 77775
Step 86: 77775 + 915 = 78690
Step 87: 78690 + 915 = 79605
Step 88: 79605 + 915 = 80520
Step 89: 80520 + 915 = 81435
Step 90: 81435 + 915 = 82350
Step 91: 82350 + 915 = 83265
Step 92: 83265 + 915 = 84180
Step 93: 84180 + 915 = 85095
Step 94: 85095 + 915 = 86010
Step 95: 86010 + 915 = 86925
Step 96: 86925 + 915 = 87840
Step 97: 87840 + 915 = 88755
Step 98: 88755 + 915 = 89670
Step 99: 89670 + 915 = 90585
Step 100: 90585 + 915 = 91500
Step 101: 91500 + 915 = 92415
Step 102: 92415 + 915 = 93330
Step 103: 93330 + 915 = 94245
Step 104: 94245 + 915 = 95160
Step 105: 95160 + 915 = 96075
Step 106: 96075 + 915 = 96990
Step 107: 96990 + 915 = 97905
Step 108: 97905 + 915 = 98820
Step 109: 98820 + 915 = 99735
Step 110: 99735 + 915 = 100650
Step 111: 100650 + 915 = 101565
Step 112: 101565 + 915 = 102480
Step 113: 102480 + 915 = 103395
Step 114: 103395 + 915 = 104310
Step 115: 104310 + 915 = 105225
Step 116: 105225 + 915 = 106140
Step 117: 106140 + 915 = 107055
Step 118: 107055 + 915 = 107970
Step 119: 107970 + 915 = 108885
Step 120: 108885 + 915 = 109800
Step 121: 109800 + 915 = 110715
Step 122: 110715 + 915 = 111630
Step 123: 111630 + 915 = 112545
Step 124: 112545 + 915 = 113460
Step 125: 113460 + 915 = 114375
Step 126: 114375 + 915 = 115290
Step 127: 115290 + 915 = 116205
Step 128: 116205 + 915 = 117120
Step 129: 117120 + 915 = 118035
Step 130: 118035 + 915 = 118950
Step 131: 118950 + 915 = 119865
Step 132: 119865 + 915 = 120780
Step 133: 120780 + 915 = 121695
Step 134: 121695 + 915 = 122610
Step 135: 122610 + 915 = 123525
Step 136: 123525 + 915 = 124440
Step 137: 124440 + 915 = 125355
Step 138: 125355 + 915 = 126270
Step 139: 126270 + 915 = 127185
Step 140: 127185 + 915 = 128100
Step 141: 128100 + 915 = 129015
Step 142: 129015 + 915 = 129930
Step 143: 129930 + 915 = 130845
Step 144: 130845 + 915 = 131760
Step 145: 131760 + 915 = 132675
Step 146: 132675 + 915 = 133590
Step 147: 133590 + 915 = 134505
Step 148: 134505 + 915 = 135420
Step 149: 135420 + 915 = 136335
Step 150: 136335 + 915 = 137250
Step 151: 137250 + 915 = 138165
Step 152: 138165 + 915 = 139080
Step 153: 139080 + 915 = 139995
Step 154: 139995 + 915 = 140910
Step 155: 140910 + 915 = 141825
Step 156: 141825 + 915 = 142740
Step 157: 142740 + 915 = 143655
Step 158: 143655 + 915 = 144570
Step 159: 144570 + 915 = 145485
Step 160: 145485 + 915 = 146400
Step 161: 146400 + 915 = 147315
Step 162: 147315 + 915 = 148230
Step 163: 148230 + 915 = 149145
Step 164: 149145 + 915 = 150060
Step 165: 150060 + 915 = 150975
Step 166: 150975 + 915 = 151890
Step 167: 151890 + 915 = 152805
Step 168: 152805 + 915 = 153720
Step 169: 153720 + 915 = 154635
Step 170: 154635 + 915 = 155550
Step 171: 155550 + 915 = 156465
Step 172: 156465 + 915 = 157380
Step 173: 157380 + 915 = 158295
Step 174: 158295 + 915 = 159210
Step 175: 159210 + 915 = 160125
Step 176: 160125 + 915 = 161040
Step 177: 161040 + 915 = 161955
Step 178: 161955 + 915 = 162870
Step 179: 162870 + 915 = 163785
Step 180: 163785 + 915 = 164700
Step 181: 164700 + 915 = 165615
Step 182: 165615 + 915 = 166530
Step 183: 166530 + 915 = 167445
Step 184: 167445 + 915 = 168360
Step 185: 168360 + 915 = 169275
Step 186: 169275 + 915 = 170190
Step 187: 170190 + 915 = 171105
Step 188: 171105 + 915 = 172020
Step 189: 172020 + 915 = 172935
Step 190: 172935 + 915 = 173850
Step 191: 173850 + 915 = 174765
Step 192: 174765 + 915 = 175680
Step 193: 175680 + 915 = 176595
Step 194: 176595 + 915 = 177510
Step 195: 177510 + 915 = 178425
Step 196: 178425 + 915 = 179340
Step 197: 179340 + 915 = 180255
Step 198: 180255 + 915 = 181170
Step 199: 181170 + 915 = 182085
Step 200: 182085 + 915 = 183000
Step 201: 183000 + 915 = 183915
Step 202: 183915 + 915 = 184830
Step 203: 184830 + 915 = 185745
Step 204: 185745 + 915 = 186660
Step 205: 186660 + 915 = 187575
Step 206: 187575 + 915 = 188490
Step 207: 188490 + 915 = 189405
Step 208: 189405 + 915 = 190320
Step 209: 190320 + 915 = 191235
Step 210: 191235 + 915 = 192150
Step 211: 192150 + 915 = 193065
Step 212: 193065 + 915 = 193980
Step 213: 193980 + 915 = 194895
Step 214: 194895 + 915 = 195810
Step 215: 195810 + 915 = 196725
Step 216: 196725 + 915 = 197640
Step 217: 197640 + 915 = 198555
Step 218: 198555 + 915 = 199470
Step 219: 199470 + 915 = 200385
Step 220: 200385 + 915 = 201300
Step 221: 201300 + 915 = 202215
Step 222: 202215 + 915 = 203130
Step 223: 203130 + 915 = 204045
Step 224: 204045 + 915 = 204960
Step 225: 204960 + 915 = 205875
Step 226: 205875 + 915 = 206790
Step 227: 206790 + 915 = 207705
Step 228: 207705 + 915 = 208620
Step 229: 208620 + 915 = 209535
Step 230: 209535 + 915 = 210450
Step 231: 210450 + 915 = 211365
Step 232: 211365 + 915 = 212280
Step 233: 212280 + 915 = 213195
Step 234: 213195 + 915 = 214110
Step 235: 214110 + 915 = 215025
Step 236: 215025 + 915 = 215940
Step 237: 215940 + 915 = 216855
Step 238: 216855 + 915 = 217770
Step 239: 217770 + 915 = 218685
Step 240: 218685 + 915 = 219600
Step 241: 219600 + 915 = 220515
Step 242: 220515 + 915 = 221430
Step 243: 221430 + 915 = 222345
Step 244: 222345 + 915 = 223260
Step 245: 223260 + 915 = 224175
Step 246: 224175 + 915 = 225090
Step 247: 225090 + 915 = 226005
Step 248: 226005 + 915 = 226920
Step 249: 226920 + 915 = 227835
Step 250: 227835 + 915 = 228750
Step 251: 228750 + 915 = 229665
Step 252: 229665 + 915 = 230580
Step 253: 230580 + 915 = 231495
Step 254: 231495 + 915 = 232410
Step 255: 232410 + 915 = 233325
Step 256: 233325 + 915 = 234240
Step 257: 234240 + 915 = 235155
Step 258: 235155 + 915 = 236070
Step 259: 236070 + 915 = 236985
Step 260: 236985 + 915 = 237900
Step 261: 237900 + 915 = 238815
Step 262: 238815 + 915 = 239730
Step 263: 239730 + 915 = 240645
Step 264: 240645 + 915 = 241560
Step 265: 241560 + 915 = 242475
Step 266: 242475 + 915 = 243390
Step 267: 243390 + 915 = 244305
Step 268: 244305 + 915 = 245220
Step 269: 245220 + 915 = 246135
Step 270: 246135 + 915 = 247050
Step 271: 247050 + 915 = 247965
Step 272: 247965 + 915 = 248880
Step 273: 248880 + 915 = 249795
Step 274: 249795 + 915 = 250710
Step 275: 250710 + 915 = 251625
Step 276: 251625 + 915 = 252540
Step 277: 252540 + 915 = 253455
Step 278: 253455 + 915 = 254370
Step 279: 254370 + 915 = 255285
Step 280: 255285 + 915 = 256200
Step 281: 256200 + 915 = 257115
Step 282: 257115 + 915 = 258030
Step 283: 258030 + 915 = 258945
Step 284: 258945 + 915 = 259860
Step 285: 259860 + 915 = 260775
Step 286: 260775 + 915 = 261690
Step 287: 261690 + 915 = 262605
Step 288: 262605 + 915 = 263520
Step 289: 263520 + 915 = 264435
Step 290: 264435 + 915 = 265350
Step 291: 265350 + 915 = 266265
Step 292: 266265 + 915 = 267180
Step 293: 267180 + 915 = 268095
Step 294: 268095 + 915 = 269010
Step 295: 269010 + 915 = 269925
Step 296: 269925 + 915 = 270840
Step 297: 270840 + 915 = 271755
Step 298: 271755 + 915 = 272670
Step 299: 272670 + 915 = 273585
Step 300: 273585 + 915 = 274500
Step 301: 274500 + 915 = 275415
Step 302: 275415 + 915 = 276330
Step 303: 276330 + 915 = 277245
Step 304: 277245 + 915 = 278160
Step 305: 278160 + 915 = 279075
Step 306: 279075 + 915 = 279990
Step 307: 279990 + 915 = 280905
Step 308: 280905 + 915 = 281820
Step 309: 281820 + 915 = 282735
Step 310: 282735 + 915 = 283650
Step 311: 283650 + 915 = 284565
Step 312: 284565 + 915 = 285480
Step 313: 285480 + 915 = 286395
Step 314: 286395 + 915 = 287310
Step 315: 287310 + 915 = 288225
Step 316: 288225 + 915 = 289140
Step 317: 289140 + 915 = 290055
Step 318: 290055 + 915 = 290970
Step 319: 290970 + 915 = 291885
Step 320: 291885 + 915 = 292800
Step 321: 292800 + 915 = 293715
Step 322: 293715 + 915 = 294630
Step 323: 294630 + 915 = 295545
Step 324: 295545 + 915 = 296460
Step 325: 296460 + 915 = 297375
Step 326: 297375 + 915 = 298290
Step 327: 298290 + 915 = 299205
Step 328: 299205 + 915 = 300120
Step 329: 300120 + 915 = 301035
Step 330: 301035 + 915 = 301950
Step 331: 301950 + 915 = 302865
Step 332: 302865 + 915 = 303780
Step 333: 303780 + 915 = 304695
Step 334: 304695 + 915 = 305610
Step 335: 305610 + 915 = 306525
Step 336: 306525 + 915 = 307440
Step 337: 307440 + 915 = 308355
Step 338: 308355 + 915 = 309270
Step 339: 309270 + 915 = 310185
Step 340: 310185 + 915 = 311100
Step 341: 311100 + 915 = 312015
Step 342: 312015 + 915 = 312930
Step 343: 312930 + 915 = 313845
Step 344: 313845 + 915 = 314760
Step 345: 314760 + 915 = 315675
Step 346: 315675 + 915 = 316590
Step 347: 316590 + 915 = 317505
Step 348: 317505 + 915 = 318420
Step 349: 318420 + 915 = 319335
Step 350: 319335 + 915 = 320250
Step 351: 320250 + 915 = 321165
Step 352: 321165 + 915 = 322080
Step 353: 322080 + 915 = 322995
Step 354: 322995 + 915 = 323910
Step 355: 323910 + 915 = 324825
Step 356: 324825 + 915 = 325740
Step 357: 325740 + 915 = 326655
Step 358: 326655 + 915 = 327570
Step 359: 327570 + 915 = 328485
Step 360: 328485 + 915 = 329400
Step 361: 329400 + 915 = 330315
Step 362: 330315 + 915 = 331230
Step 363: 331230 + 915 = 332145
Step 364: 332145 + 915 = 333060
Step 365: 333060 + 915 = 333975
Step 366: 333975 + 915 = 334890
Step 367: 334890 + 915 = 335805
Step 368: 335805 + 915 = 336720
Step 369: 336720 + 915 = 337635
Step 370: 337635 + 915 = 338550
Step 371: 338550 + 915 = 339465
Step 372: 339465 + 915 = 340380
Step 373: 340380 + 915 = 341295
Step 374: 341295 + 915 = 342210
Step 375: 342210 + 915 = 343125
Step 376: 343125 + 915 = 344040
Step 377: 344040 + 915 = 344955
Step 378: 344955 + 915 = 345870
Step 379: 345870 + 915 = 346785
Step 380: 346785 + 915 = 347700
Step 381: 347700 + 915 = 348615
Step 382: 348615 + 915 = 349530
Step 383: 349530 + 915 = 350445
Step 384: 350445 + 915 = 351360
Step 385: 351360 + 915 = 352275
Step 386: 352275 + 915 = 353190
Step 387: 353190 + 915 = 354105
Step 388: 354105 + 915 = 355020
Step 389: 355020 + 915 = 355935
Step 390: 355935 + 915 = 356850
Step 391: 356850 + 915 = 357765
Step 392: 357765 + 915 = 358680
Step 393: 358680 + 915 = 359595
Step 394: 359595 + 915 = 360510
Step 395: 360510 + 915 = 361425
Step 396: 361425 + 915 = 362340
Step 397: 362340 + 915 = 363255
Step 398: 363255 + 915 = 364170

So, 915*398 = 364170