Alright, let's solve this math problem step by step. First, we have the number 39. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 387. So, we're going to take the number 39 and add it to itself 387 times.
Step 1: 0 + 39 = 39
Step 2: 39 + 39 = 78
Step 3: 78 + 39 = 117
Step 4: 117 + 39 = 156
Step 5: 156 + 39 = 195
Step 6: 195 + 39 = 234
Step 7: 234 + 39 = 273
Step 8: 273 + 39 = 312
Step 9: 312 + 39 = 351
Step 10: 351 + 39 = 390
Step 11: 390 + 39 = 429
Step 12: 429 + 39 = 468
Step 13: 468 + 39 = 507
Step 14: 507 + 39 = 546
Step 15: 546 + 39 = 585
Step 16: 585 + 39 = 624
Step 17: 624 + 39 = 663
Step 18: 663 + 39 = 702
Step 19: 702 + 39 = 741
Step 20: 741 + 39 = 780
Step 21: 780 + 39 = 819
Step 22: 819 + 39 = 858
Step 23: 858 + 39 = 897
Step 24: 897 + 39 = 936
Step 25: 936 + 39 = 975
Step 26: 975 + 39 = 1014
Step 27: 1014 + 39 = 1053
Step 28: 1053 + 39 = 1092
Step 29: 1092 + 39 = 1131
Step 30: 1131 + 39 = 1170
Step 31: 1170 + 39 = 1209
Step 32: 1209 + 39 = 1248
Step 33: 1248 + 39 = 1287
Step 34: 1287 + 39 = 1326
Step 35: 1326 + 39 = 1365
Step 36: 1365 + 39 = 1404
Step 37: 1404 + 39 = 1443
Step 38: 1443 + 39 = 1482
Step 39: 1482 + 39 = 1521
Step 40: 1521 + 39 = 1560
Step 41: 1560 + 39 = 1599
Step 42: 1599 + 39 = 1638
Step 43: 1638 + 39 = 1677
Step 44: 1677 + 39 = 1716
Step 45: 1716 + 39 = 1755
Step 46: 1755 + 39 = 1794
Step 47: 1794 + 39 = 1833
Step 48: 1833 + 39 = 1872
Step 49: 1872 + 39 = 1911
Step 50: 1911 + 39 = 1950
Step 51: 1950 + 39 = 1989
Step 52: 1989 + 39 = 2028
Step 53: 2028 + 39 = 2067
Step 54: 2067 + 39 = 2106
Step 55: 2106 + 39 = 2145
Step 56: 2145 + 39 = 2184
Step 57: 2184 + 39 = 2223
Step 58: 2223 + 39 = 2262
Step 59: 2262 + 39 = 2301
Step 60: 2301 + 39 = 2340
Step 61: 2340 + 39 = 2379
Step 62: 2379 + 39 = 2418
Step 63: 2418 + 39 = 2457
Step 64: 2457 + 39 = 2496
Step 65: 2496 + 39 = 2535
Step 66: 2535 + 39 = 2574
Step 67: 2574 + 39 = 2613
Step 68: 2613 + 39 = 2652
Step 69: 2652 + 39 = 2691
Step 70: 2691 + 39 = 2730
Step 71: 2730 + 39 = 2769
Step 72: 2769 + 39 = 2808
Step 73: 2808 + 39 = 2847
Step 74: 2847 + 39 = 2886
Step 75: 2886 + 39 = 2925
Step 76: 2925 + 39 = 2964
Step 77: 2964 + 39 = 3003
Step 78: 3003 + 39 = 3042
Step 79: 3042 + 39 = 3081
Step 80: 3081 + 39 = 3120
Step 81: 3120 + 39 = 3159
Step 82: 3159 + 39 = 3198
Step 83: 3198 + 39 = 3237
Step 84: 3237 + 39 = 3276
Step 85: 3276 + 39 = 3315
Step 86: 3315 + 39 = 3354
Step 87: 3354 + 39 = 3393
Step 88: 3393 + 39 = 3432
Step 89: 3432 + 39 = 3471
Step 90: 3471 + 39 = 3510
Step 91: 3510 + 39 = 3549
Step 92: 3549 + 39 = 3588
Step 93: 3588 + 39 = 3627
Step 94: 3627 + 39 = 3666
Step 95: 3666 + 39 = 3705
Step 96: 3705 + 39 = 3744
Step 97: 3744 + 39 = 3783
Step 98: 3783 + 39 = 3822
Step 99: 3822 + 39 = 3861
Step 100: 3861 + 39 = 3900
Step 101: 3900 + 39 = 3939
Step 102: 3939 + 39 = 3978
Step 103: 3978 + 39 = 4017
Step 104: 4017 + 39 = 4056
Step 105: 4056 + 39 = 4095
Step 106: 4095 + 39 = 4134
Step 107: 4134 + 39 = 4173
Step 108: 4173 + 39 = 4212
Step 109: 4212 + 39 = 4251
Step 110: 4251 + 39 = 4290
Step 111: 4290 + 39 = 4329
Step 112: 4329 + 39 = 4368
Step 113: 4368 + 39 = 4407
Step 114: 4407 + 39 = 4446
Step 115: 4446 + 39 = 4485
Step 116: 4485 + 39 = 4524
Step 117: 4524 + 39 = 4563
Step 118: 4563 + 39 = 4602
Step 119: 4602 + 39 = 4641
Step 120: 4641 + 39 = 4680
Step 121: 4680 + 39 = 4719
Step 122: 4719 + 39 = 4758
Step 123: 4758 + 39 = 4797
Step 124: 4797 + 39 = 4836
Step 125: 4836 + 39 = 4875
Step 126: 4875 + 39 = 4914
Step 127: 4914 + 39 = 4953
Step 128: 4953 + 39 = 4992
Step 129: 4992 + 39 = 5031
Step 130: 5031 + 39 = 5070
Step 131: 5070 + 39 = 5109
Step 132: 5109 + 39 = 5148
Step 133: 5148 + 39 = 5187
Step 134: 5187 + 39 = 5226
Step 135: 5226 + 39 = 5265
Step 136: 5265 + 39 = 5304
Step 137: 5304 + 39 = 5343
Step 138: 5343 + 39 = 5382
Step 139: 5382 + 39 = 5421
Step 140: 5421 + 39 = 5460
Step 141: 5460 + 39 = 5499
Step 142: 5499 + 39 = 5538
Step 143: 5538 + 39 = 5577
Step 144: 5577 + 39 = 5616
Step 145: 5616 + 39 = 5655
Step 146: 5655 + 39 = 5694
Step 147: 5694 + 39 = 5733
Step 148: 5733 + 39 = 5772
Step 149: 5772 + 39 = 5811
Step 150: 5811 + 39 = 5850
Step 151: 5850 + 39 = 5889
Step 152: 5889 + 39 = 5928
Step 153: 5928 + 39 = 5967
Step 154: 5967 + 39 = 6006
Step 155: 6006 + 39 = 6045
Step 156: 6045 + 39 = 6084
Step 157: 6084 + 39 = 6123
Step 158: 6123 + 39 = 6162
Step 159: 6162 + 39 = 6201
Step 160: 6201 + 39 = 6240
Step 161: 6240 + 39 = 6279
Step 162: 6279 + 39 = 6318
Step 163: 6318 + 39 = 6357
Step 164: 6357 + 39 = 6396
Step 165: 6396 + 39 = 6435
Step 166: 6435 + 39 = 6474
Step 167: 6474 + 39 = 6513
Step 168: 6513 + 39 = 6552
Step 169: 6552 + 39 = 6591
Step 170: 6591 + 39 = 6630
Step 171: 6630 + 39 = 6669
Step 172: 6669 + 39 = 6708
Step 173: 6708 + 39 = 6747
Step 174: 6747 + 39 = 6786
Step 175: 6786 + 39 = 6825
Step 176: 6825 + 39 = 6864
Step 177: 6864 + 39 = 6903
Step 178: 6903 + 39 = 6942
Step 179: 6942 + 39 = 6981
Step 180: 6981 + 39 = 7020
Step 181: 7020 + 39 = 7059
Step 182: 7059 + 39 = 7098
Step 183: 7098 + 39 = 7137
Step 184: 7137 + 39 = 7176
Step 185: 7176 + 39 = 7215
Step 186: 7215 + 39 = 7254
Step 187: 7254 + 39 = 7293
Step 188: 7293 + 39 = 7332
Step 189: 7332 + 39 = 7371
Step 190: 7371 + 39 = 7410
Step 191: 7410 + 39 = 7449
Step 192: 7449 + 39 = 7488
Step 193: 7488 + 39 = 7527
Step 194: 7527 + 39 = 7566
Step 195: 7566 + 39 = 7605
Step 196: 7605 + 39 = 7644
Step 197: 7644 + 39 = 7683
Step 198: 7683 + 39 = 7722
Step 199: 7722 + 39 = 7761
Step 200: 7761 + 39 = 7800
Step 201: 7800 + 39 = 7839
Step 202: 7839 + 39 = 7878
Step 203: 7878 + 39 = 7917
Step 204: 7917 + 39 = 7956
Step 205: 7956 + 39 = 7995
Step 206: 7995 + 39 = 8034
Step 207: 8034 + 39 = 8073
Step 208: 8073 + 39 = 8112
Step 209: 8112 + 39 = 8151
Step 210: 8151 + 39 = 8190
Step 211: 8190 + 39 = 8229
Step 212: 8229 + 39 = 8268
Step 213: 8268 + 39 = 8307
Step 214: 8307 + 39 = 8346
Step 215: 8346 + 39 = 8385
Step 216: 8385 + 39 = 8424
Step 217: 8424 + 39 = 8463
Step 218: 8463 + 39 = 8502
Step 219: 8502 + 39 = 8541
Step 220: 8541 + 39 = 8580
Step 221: 8580 + 39 = 8619
Step 222: 8619 + 39 = 8658
Step 223: 8658 + 39 = 8697
Step 224: 8697 + 39 = 8736
Step 225: 8736 + 39 = 8775
Step 226: 8775 + 39 = 8814
Step 227: 8814 + 39 = 8853
Step 228: 8853 + 39 = 8892
Step 229: 8892 + 39 = 8931
Step 230: 8931 + 39 = 8970
Step 231: 8970 + 39 = 9009
Step 232: 9009 + 39 = 9048
Step 233: 9048 + 39 = 9087
Step 234: 9087 + 39 = 9126
Step 235: 9126 + 39 = 9165
Step 236: 9165 + 39 = 9204
Step 237: 9204 + 39 = 9243
Step 238: 9243 + 39 = 9282
Step 239: 9282 + 39 = 9321
Step 240: 9321 + 39 = 9360
Step 241: 9360 + 39 = 9399
Step 242: 9399 + 39 = 9438
Step 243: 9438 + 39 = 9477
Step 244: 9477 + 39 = 9516
Step 245: 9516 + 39 = 9555
Step 246: 9555 + 39 = 9594
Step 247: 9594 + 39 = 9633
Step 248: 9633 + 39 = 9672
Step 249: 9672 + 39 = 9711
Step 250: 9711 + 39 = 9750
Step 251: 9750 + 39 = 9789
Step 252: 9789 + 39 = 9828
Step 253: 9828 + 39 = 9867
Step 254: 9867 + 39 = 9906
Step 255: 9906 + 39 = 9945
Step 256: 9945 + 39 = 9984
Step 257: 9984 + 39 = 10023
Step 258: 10023 + 39 = 10062
Step 259: 10062 + 39 = 10101
Step 260: 10101 + 39 = 10140
Step 261: 10140 + 39 = 10179
Step 262: 10179 + 39 = 10218
Step 263: 10218 + 39 = 10257
Step 264: 10257 + 39 = 10296
Step 265: 10296 + 39 = 10335
Step 266: 10335 + 39 = 10374
Step 267: 10374 + 39 = 10413
Step 268: 10413 + 39 = 10452
Step 269: 10452 + 39 = 10491
Step 270: 10491 + 39 = 10530
Step 271: 10530 + 39 = 10569
Step 272: 10569 + 39 = 10608
Step 273: 10608 + 39 = 10647
Step 274: 10647 + 39 = 10686
Step 275: 10686 + 39 = 10725
Step 276: 10725 + 39 = 10764
Step 277: 10764 + 39 = 10803
Step 278: 10803 + 39 = 10842
Step 279: 10842 + 39 = 10881
Step 280: 10881 + 39 = 10920
Step 281: 10920 + 39 = 10959
Step 282: 10959 + 39 = 10998
Step 283: 10998 + 39 = 11037
Step 284: 11037 + 39 = 11076
Step 285: 11076 + 39 = 11115
Step 286: 11115 + 39 = 11154
Step 287: 11154 + 39 = 11193
Step 288: 11193 + 39 = 11232
Step 289: 11232 + 39 = 11271
Step 290: 11271 + 39 = 11310
Step 291: 11310 + 39 = 11349
Step 292: 11349 + 39 = 11388
Step 293: 11388 + 39 = 11427
Step 294: 11427 + 39 = 11466
Step 295: 11466 + 39 = 11505
Step 296: 11505 + 39 = 11544
Step 297: 11544 + 39 = 11583
Step 298: 11583 + 39 = 11622
Step 299: 11622 + 39 = 11661
Step 300: 11661 + 39 = 11700
Step 301: 11700 + 39 = 11739
Step 302: 11739 + 39 = 11778
Step 303: 11778 + 39 = 11817
Step 304: 11817 + 39 = 11856
Step 305: 11856 + 39 = 11895
Step 306: 11895 + 39 = 11934
Step 307: 11934 + 39 = 11973
Step 308: 11973 + 39 = 12012
Step 309: 12012 + 39 = 12051
Step 310: 12051 + 39 = 12090
Step 311: 12090 + 39 = 12129
Step 312: 12129 + 39 = 12168
Step 313: 12168 + 39 = 12207
Step 314: 12207 + 39 = 12246
Step 315: 12246 + 39 = 12285
Step 316: 12285 + 39 = 12324
Step 317: 12324 + 39 = 12363
Step 318: 12363 + 39 = 12402
Step 319: 12402 + 39 = 12441
Step 320: 12441 + 39 = 12480
Step 321: 12480 + 39 = 12519
Step 322: 12519 + 39 = 12558
Step 323: 12558 + 39 = 12597
Step 324: 12597 + 39 = 12636
Step 325: 12636 + 39 = 12675
Step 326: 12675 + 39 = 12714
Step 327: 12714 + 39 = 12753
Step 328: 12753 + 39 = 12792
Step 329: 12792 + 39 = 12831
Step 330: 12831 + 39 = 12870
Step 331: 12870 + 39 = 12909
Step 332: 12909 + 39 = 12948
Step 333: 12948 + 39 = 12987
Step 334: 12987 + 39 = 13026
Step 335: 13026 + 39 = 13065
Step 336: 13065 + 39 = 13104
Step 337: 13104 + 39 = 13143
Step 338: 13143 + 39 = 13182
Step 339: 13182 + 39 = 13221
Step 340: 13221 + 39 = 13260
Step 341: 13260 + 39 = 13299
Step 342: 13299 + 39 = 13338
Step 343: 13338 + 39 = 13377
Step 344: 13377 + 39 = 13416
Step 345: 13416 + 39 = 13455
Step 346: 13455 + 39 = 13494
Step 347: 13494 + 39 = 13533
Step 348: 13533 + 39 = 13572
Step 349: 13572 + 39 = 13611
Step 350: 13611 + 39 = 13650
Step 351: 13650 + 39 = 13689
Step 352: 13689 + 39 = 13728
Step 353: 13728 + 39 = 13767
Step 354: 13767 + 39 = 13806
Step 355: 13806 + 39 = 13845
Step 356: 13845 + 39 = 13884
Step 357: 13884 + 39 = 13923
Step 358: 13923 + 39 = 13962
Step 359: 13962 + 39 = 14001
Step 360: 14001 + 39 = 14040
Step 361: 14040 + 39 = 14079
Step 362: 14079 + 39 = 14118
Step 363: 14118 + 39 = 14157
Step 364: 14157 + 39 = 14196
Step 365: 14196 + 39 = 14235
Step 366: 14235 + 39 = 14274
Step 367: 14274 + 39 = 14313
Step 368: 14313 + 39 = 14352
Step 369: 14352 + 39 = 14391
Step 370: 14391 + 39 = 14430
Step 371: 14430 + 39 = 14469
Step 372: 14469 + 39 = 14508
Step 373: 14508 + 39 = 14547
Step 374: 14547 + 39 = 14586
Step 375: 14586 + 39 = 14625
Step 376: 14625 + 39 = 14664
Step 377: 14664 + 39 = 14703
Step 378: 14703 + 39 = 14742
Step 379: 14742 + 39 = 14781
Step 380: 14781 + 39 = 14820
Step 381: 14820 + 39 = 14859
Step 382: 14859 + 39 = 14898
Step 383: 14898 + 39 = 14937
Step 384: 14937 + 39 = 14976
Step 385: 14976 + 39 = 15015
Step 386: 15015 + 39 = 15054
Step 387: 15054 + 39 = 15093

So, 39*387 = 15093