Alright, let's solve this math problem step by step. First, we have the number 764. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 399. So, we're going to take the number 764 and add it to itself 399 times.
Step 1: 0 + 764 = 764
Step 2: 764 + 764 = 1528
Step 3: 1528 + 764 = 2292
Step 4: 2292 + 764 = 3056
Step 5: 3056 + 764 = 3820
Step 6: 3820 + 764 = 4584
Step 7: 4584 + 764 = 5348
Step 8: 5348 + 764 = 6112
Step 9: 6112 + 764 = 6876
Step 10: 6876 + 764 = 7640
Step 11: 7640 + 764 = 8404
Step 12: 8404 + 764 = 9168
Step 13: 9168 + 764 = 9932
Step 14: 9932 + 764 = 10696
Step 15: 10696 + 764 = 11460
Step 16: 11460 + 764 = 12224
Step 17: 12224 + 764 = 12988
Step 18: 12988 + 764 = 13752
Step 19: 13752 + 764 = 14516
Step 20: 14516 + 764 = 15280
Step 21: 15280 + 764 = 16044
Step 22: 16044 + 764 = 16808
Step 23: 16808 + 764 = 17572
Step 24: 17572 + 764 = 18336
Step 25: 18336 + 764 = 19100
Step 26: 19100 + 764 = 19864
Step 27: 19864 + 764 = 20628
Step 28: 20628 + 764 = 21392
Step 29: 21392 + 764 = 22156
Step 30: 22156 + 764 = 22920
Step 31: 22920 + 764 = 23684
Step 32: 23684 + 764 = 24448
Step 33: 24448 + 764 = 25212
Step 34: 25212 + 764 = 25976
Step 35: 25976 + 764 = 26740
Step 36: 26740 + 764 = 27504
Step 37: 27504 + 764 = 28268
Step 38: 28268 + 764 = 29032
Step 39: 29032 + 764 = 29796
Step 40: 29796 + 764 = 30560
Step 41: 30560 + 764 = 31324
Step 42: 31324 + 764 = 32088
Step 43: 32088 + 764 = 32852
Step 44: 32852 + 764 = 33616
Step 45: 33616 + 764 = 34380
Step 46: 34380 + 764 = 35144
Step 47: 35144 + 764 = 35908
Step 48: 35908 + 764 = 36672
Step 49: 36672 + 764 = 37436
Step 50: 37436 + 764 = 38200
Step 51: 38200 + 764 = 38964
Step 52: 38964 + 764 = 39728
Step 53: 39728 + 764 = 40492
Step 54: 40492 + 764 = 41256
Step 55: 41256 + 764 = 42020
Step 56: 42020 + 764 = 42784
Step 57: 42784 + 764 = 43548
Step 58: 43548 + 764 = 44312
Step 59: 44312 + 764 = 45076
Step 60: 45076 + 764 = 45840
Step 61: 45840 + 764 = 46604
Step 62: 46604 + 764 = 47368
Step 63: 47368 + 764 = 48132
Step 64: 48132 + 764 = 48896
Step 65: 48896 + 764 = 49660
Step 66: 49660 + 764 = 50424
Step 67: 50424 + 764 = 51188
Step 68: 51188 + 764 = 51952
Step 69: 51952 + 764 = 52716
Step 70: 52716 + 764 = 53480
Step 71: 53480 + 764 = 54244
Step 72: 54244 + 764 = 55008
Step 73: 55008 + 764 = 55772
Step 74: 55772 + 764 = 56536
Step 75: 56536 + 764 = 57300
Step 76: 57300 + 764 = 58064
Step 77: 58064 + 764 = 58828
Step 78: 58828 + 764 = 59592
Step 79: 59592 + 764 = 60356
Step 80: 60356 + 764 = 61120
Step 81: 61120 + 764 = 61884
Step 82: 61884 + 764 = 62648
Step 83: 62648 + 764 = 63412
Step 84: 63412 + 764 = 64176
Step 85: 64176 + 764 = 64940
Step 86: 64940 + 764 = 65704
Step 87: 65704 + 764 = 66468
Step 88: 66468 + 764 = 67232
Step 89: 67232 + 764 = 67996
Step 90: 67996 + 764 = 68760
Step 91: 68760 + 764 = 69524
Step 92: 69524 + 764 = 70288
Step 93: 70288 + 764 = 71052
Step 94: 71052 + 764 = 71816
Step 95: 71816 + 764 = 72580
Step 96: 72580 + 764 = 73344
Step 97: 73344 + 764 = 74108
Step 98: 74108 + 764 = 74872
Step 99: 74872 + 764 = 75636
Step 100: 75636 + 764 = 76400
Step 101: 76400 + 764 = 77164
Step 102: 77164 + 764 = 77928
Step 103: 77928 + 764 = 78692
Step 104: 78692 + 764 = 79456
Step 105: 79456 + 764 = 80220
Step 106: 80220 + 764 = 80984
Step 107: 80984 + 764 = 81748
Step 108: 81748 + 764 = 82512
Step 109: 82512 + 764 = 83276
Step 110: 83276 + 764 = 84040
Step 111: 84040 + 764 = 84804
Step 112: 84804 + 764 = 85568
Step 113: 85568 + 764 = 86332
Step 114: 86332 + 764 = 87096
Step 115: 87096 + 764 = 87860
Step 116: 87860 + 764 = 88624
Step 117: 88624 + 764 = 89388
Step 118: 89388 + 764 = 90152
Step 119: 90152 + 764 = 90916
Step 120: 90916 + 764 = 91680
Step 121: 91680 + 764 = 92444
Step 122: 92444 + 764 = 93208
Step 123: 93208 + 764 = 93972
Step 124: 93972 + 764 = 94736
Step 125: 94736 + 764 = 95500
Step 126: 95500 + 764 = 96264
Step 127: 96264 + 764 = 97028
Step 128: 97028 + 764 = 97792
Step 129: 97792 + 764 = 98556
Step 130: 98556 + 764 = 99320
Step 131: 99320 + 764 = 100084
Step 132: 100084 + 764 = 100848
Step 133: 100848 + 764 = 101612
Step 134: 101612 + 764 = 102376
Step 135: 102376 + 764 = 103140
Step 136: 103140 + 764 = 103904
Step 137: 103904 + 764 = 104668
Step 138: 104668 + 764 = 105432
Step 139: 105432 + 764 = 106196
Step 140: 106196 + 764 = 106960
Step 141: 106960 + 764 = 107724
Step 142: 107724 + 764 = 108488
Step 143: 108488 + 764 = 109252
Step 144: 109252 + 764 = 110016
Step 145: 110016 + 764 = 110780
Step 146: 110780 + 764 = 111544
Step 147: 111544 + 764 = 112308
Step 148: 112308 + 764 = 113072
Step 149: 113072 + 764 = 113836
Step 150: 113836 + 764 = 114600
Step 151: 114600 + 764 = 115364
Step 152: 115364 + 764 = 116128
Step 153: 116128 + 764 = 116892
Step 154: 116892 + 764 = 117656
Step 155: 117656 + 764 = 118420
Step 156: 118420 + 764 = 119184
Step 157: 119184 + 764 = 119948
Step 158: 119948 + 764 = 120712
Step 159: 120712 + 764 = 121476
Step 160: 121476 + 764 = 122240
Step 161: 122240 + 764 = 123004
Step 162: 123004 + 764 = 123768
Step 163: 123768 + 764 = 124532
Step 164: 124532 + 764 = 125296
Step 165: 125296 + 764 = 126060
Step 166: 126060 + 764 = 126824
Step 167: 126824 + 764 = 127588
Step 168: 127588 + 764 = 128352
Step 169: 128352 + 764 = 129116
Step 170: 129116 + 764 = 129880
Step 171: 129880 + 764 = 130644
Step 172: 130644 + 764 = 131408
Step 173: 131408 + 764 = 132172
Step 174: 132172 + 764 = 132936
Step 175: 132936 + 764 = 133700
Step 176: 133700 + 764 = 134464
Step 177: 134464 + 764 = 135228
Step 178: 135228 + 764 = 135992
Step 179: 135992 + 764 = 136756
Step 180: 136756 + 764 = 137520
Step 181: 137520 + 764 = 138284
Step 182: 138284 + 764 = 139048
Step 183: 139048 + 764 = 139812
Step 184: 139812 + 764 = 140576
Step 185: 140576 + 764 = 141340
Step 186: 141340 + 764 = 142104
Step 187: 142104 + 764 = 142868
Step 188: 142868 + 764 = 143632
Step 189: 143632 + 764 = 144396
Step 190: 144396 + 764 = 145160
Step 191: 145160 + 764 = 145924
Step 192: 145924 + 764 = 146688
Step 193: 146688 + 764 = 147452
Step 194: 147452 + 764 = 148216
Step 195: 148216 + 764 = 148980
Step 196: 148980 + 764 = 149744
Step 197: 149744 + 764 = 150508
Step 198: 150508 + 764 = 151272
Step 199: 151272 + 764 = 152036
Step 200: 152036 + 764 = 152800
Step 201: 152800 + 764 = 153564
Step 202: 153564 + 764 = 154328
Step 203: 154328 + 764 = 155092
Step 204: 155092 + 764 = 155856
Step 205: 155856 + 764 = 156620
Step 206: 156620 + 764 = 157384
Step 207: 157384 + 764 = 158148
Step 208: 158148 + 764 = 158912
Step 209: 158912 + 764 = 159676
Step 210: 159676 + 764 = 160440
Step 211: 160440 + 764 = 161204
Step 212: 161204 + 764 = 161968
Step 213: 161968 + 764 = 162732
Step 214: 162732 + 764 = 163496
Step 215: 163496 + 764 = 164260
Step 216: 164260 + 764 = 165024
Step 217: 165024 + 764 = 165788
Step 218: 165788 + 764 = 166552
Step 219: 166552 + 764 = 167316
Step 220: 167316 + 764 = 168080
Step 221: 168080 + 764 = 168844
Step 222: 168844 + 764 = 169608
Step 223: 169608 + 764 = 170372
Step 224: 170372 + 764 = 171136
Step 225: 171136 + 764 = 171900
Step 226: 171900 + 764 = 172664
Step 227: 172664 + 764 = 173428
Step 228: 173428 + 764 = 174192
Step 229: 174192 + 764 = 174956
Step 230: 174956 + 764 = 175720
Step 231: 175720 + 764 = 176484
Step 232: 176484 + 764 = 177248
Step 233: 177248 + 764 = 178012
Step 234: 178012 + 764 = 178776
Step 235: 178776 + 764 = 179540
Step 236: 179540 + 764 = 180304
Step 237: 180304 + 764 = 181068
Step 238: 181068 + 764 = 181832
Step 239: 181832 + 764 = 182596
Step 240: 182596 + 764 = 183360
Step 241: 183360 + 764 = 184124
Step 242: 184124 + 764 = 184888
Step 243: 184888 + 764 = 185652
Step 244: 185652 + 764 = 186416
Step 245: 186416 + 764 = 187180
Step 246: 187180 + 764 = 187944
Step 247: 187944 + 764 = 188708
Step 248: 188708 + 764 = 189472
Step 249: 189472 + 764 = 190236
Step 250: 190236 + 764 = 191000
Step 251: 191000 + 764 = 191764
Step 252: 191764 + 764 = 192528
Step 253: 192528 + 764 = 193292
Step 254: 193292 + 764 = 194056
Step 255: 194056 + 764 = 194820
Step 256: 194820 + 764 = 195584
Step 257: 195584 + 764 = 196348
Step 258: 196348 + 764 = 197112
Step 259: 197112 + 764 = 197876
Step 260: 197876 + 764 = 198640
Step 261: 198640 + 764 = 199404
Step 262: 199404 + 764 = 200168
Step 263: 200168 + 764 = 200932
Step 264: 200932 + 764 = 201696
Step 265: 201696 + 764 = 202460
Step 266: 202460 + 764 = 203224
Step 267: 203224 + 764 = 203988
Step 268: 203988 + 764 = 204752
Step 269: 204752 + 764 = 205516
Step 270: 205516 + 764 = 206280
Step 271: 206280 + 764 = 207044
Step 272: 207044 + 764 = 207808
Step 273: 207808 + 764 = 208572
Step 274: 208572 + 764 = 209336
Step 275: 209336 + 764 = 210100
Step 276: 210100 + 764 = 210864
Step 277: 210864 + 764 = 211628
Step 278: 211628 + 764 = 212392
Step 279: 212392 + 764 = 213156
Step 280: 213156 + 764 = 213920
Step 281: 213920 + 764 = 214684
Step 282: 214684 + 764 = 215448
Step 283: 215448 + 764 = 216212
Step 284: 216212 + 764 = 216976
Step 285: 216976 + 764 = 217740
Step 286: 217740 + 764 = 218504
Step 287: 218504 + 764 = 219268
Step 288: 219268 + 764 = 220032
Step 289: 220032 + 764 = 220796
Step 290: 220796 + 764 = 221560
Step 291: 221560 + 764 = 222324
Step 292: 222324 + 764 = 223088
Step 293: 223088 + 764 = 223852
Step 294: 223852 + 764 = 224616
Step 295: 224616 + 764 = 225380
Step 296: 225380 + 764 = 226144
Step 297: 226144 + 764 = 226908
Step 298: 226908 + 764 = 227672
Step 299: 227672 + 764 = 228436
Step 300: 228436 + 764 = 229200
Step 301: 229200 + 764 = 229964
Step 302: 229964 + 764 = 230728
Step 303: 230728 + 764 = 231492
Step 304: 231492 + 764 = 232256
Step 305: 232256 + 764 = 233020
Step 306: 233020 + 764 = 233784
Step 307: 233784 + 764 = 234548
Step 308: 234548 + 764 = 235312
Step 309: 235312 + 764 = 236076
Step 310: 236076 + 764 = 236840
Step 311: 236840 + 764 = 237604
Step 312: 237604 + 764 = 238368
Step 313: 238368 + 764 = 239132
Step 314: 239132 + 764 = 239896
Step 315: 239896 + 764 = 240660
Step 316: 240660 + 764 = 241424
Step 317: 241424 + 764 = 242188
Step 318: 242188 + 764 = 242952
Step 319: 242952 + 764 = 243716
Step 320: 243716 + 764 = 244480
Step 321: 244480 + 764 = 245244
Step 322: 245244 + 764 = 246008
Step 323: 246008 + 764 = 246772
Step 324: 246772 + 764 = 247536
Step 325: 247536 + 764 = 248300
Step 326: 248300 + 764 = 249064
Step 327: 249064 + 764 = 249828
Step 328: 249828 + 764 = 250592
Step 329: 250592 + 764 = 251356
Step 330: 251356 + 764 = 252120
Step 331: 252120 + 764 = 252884
Step 332: 252884 + 764 = 253648
Step 333: 253648 + 764 = 254412
Step 334: 254412 + 764 = 255176
Step 335: 255176 + 764 = 255940
Step 336: 255940 + 764 = 256704
Step 337: 256704 + 764 = 257468
Step 338: 257468 + 764 = 258232
Step 339: 258232 + 764 = 258996
Step 340: 258996 + 764 = 259760
Step 341: 259760 + 764 = 260524
Step 342: 260524 + 764 = 261288
Step 343: 261288 + 764 = 262052
Step 344: 262052 + 764 = 262816
Step 345: 262816 + 764 = 263580
Step 346: 263580 + 764 = 264344
Step 347: 264344 + 764 = 265108
Step 348: 265108 + 764 = 265872
Step 349: 265872 + 764 = 266636
Step 350: 266636 + 764 = 267400
Step 351: 267400 + 764 = 268164
Step 352: 268164 + 764 = 268928
Step 353: 268928 + 764 = 269692
Step 354: 269692 + 764 = 270456
Step 355: 270456 + 764 = 271220
Step 356: 271220 + 764 = 271984
Step 357: 271984 + 764 = 272748
Step 358: 272748 + 764 = 273512
Step 359: 273512 + 764 = 274276
Step 360: 274276 + 764 = 275040
Step 361: 275040 + 764 = 275804
Step 362: 275804 + 764 = 276568
Step 363: 276568 + 764 = 277332
Step 364: 277332 + 764 = 278096
Step 365: 278096 + 764 = 278860
Step 366: 278860 + 764 = 279624
Step 367: 279624 + 764 = 280388
Step 368: 280388 + 764 = 281152
Step 369: 281152 + 764 = 281916
Step 370: 281916 + 764 = 282680
Step 371: 282680 + 764 = 283444
Step 372: 283444 + 764 = 284208
Step 373: 284208 + 764 = 284972
Step 374: 284972 + 764 = 285736
Step 375: 285736 + 764 = 286500
Step 376: 286500 + 764 = 287264
Step 377: 287264 + 764 = 288028
Step 378: 288028 + 764 = 288792
Step 379: 288792 + 764 = 289556
Step 380: 289556 + 764 = 290320
Step 381: 290320 + 764 = 291084
Step 382: 291084 + 764 = 291848
Step 383: 291848 + 764 = 292612
Step 384: 292612 + 764 = 293376
Step 385: 293376 + 764 = 294140
Step 386: 294140 + 764 = 294904
Step 387: 294904 + 764 = 295668
Step 388: 295668 + 764 = 296432
Step 389: 296432 + 764 = 297196
Step 390: 297196 + 764 = 297960
Step 391: 297960 + 764 = 298724
Step 392: 298724 + 764 = 299488
Step 393: 299488 + 764 = 300252
Step 394: 300252 + 764 = 301016
Step 395: 301016 + 764 = 301780
Step 396: 301780 + 764 = 302544
Step 397: 302544 + 764 = 303308
Step 398: 303308 + 764 = 304072
Step 399: 304072 + 764 = 304836

So, 764*399 = 304836