Alright, let's solve this math problem step by step. First, we have the number 78. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 239. So, we're going to take the number 78 and add it to itself 239 times.
Step 1: 0 + 78 = 78
Step 2: 78 + 78 = 156
Step 3: 156 + 78 = 234
Step 4: 234 + 78 = 312
Step 5: 312 + 78 = 390
Step 6: 390 + 78 = 468
Step 7: 468 + 78 = 546
Step 8: 546 + 78 = 624
Step 9: 624 + 78 = 702
Step 10: 702 + 78 = 780
Step 11: 780 + 78 = 858
Step 12: 858 + 78 = 936
Step 13: 936 + 78 = 1014
Step 14: 1014 + 78 = 1092
Step 15: 1092 + 78 = 1170
Step 16: 1170 + 78 = 1248
Step 17: 1248 + 78 = 1326
Step 18: 1326 + 78 = 1404
Step 19: 1404 + 78 = 1482
Step 20: 1482 + 78 = 1560
Step 21: 1560 + 78 = 1638
Step 22: 1638 + 78 = 1716
Step 23: 1716 + 78 = 1794
Step 24: 1794 + 78 = 1872
Step 25: 1872 + 78 = 1950
Step 26: 1950 + 78 = 2028
Step 27: 2028 + 78 = 2106
Step 28: 2106 + 78 = 2184
Step 29: 2184 + 78 = 2262
Step 30: 2262 + 78 = 2340
Step 31: 2340 + 78 = 2418
Step 32: 2418 + 78 = 2496
Step 33: 2496 + 78 = 2574
Step 34: 2574 + 78 = 2652
Step 35: 2652 + 78 = 2730
Step 36: 2730 + 78 = 2808
Step 37: 2808 + 78 = 2886
Step 38: 2886 + 78 = 2964
Step 39: 2964 + 78 = 3042
Step 40: 3042 + 78 = 3120
Step 41: 3120 + 78 = 3198
Step 42: 3198 + 78 = 3276
Step 43: 3276 + 78 = 3354
Step 44: 3354 + 78 = 3432
Step 45: 3432 + 78 = 3510
Step 46: 3510 + 78 = 3588
Step 47: 3588 + 78 = 3666
Step 48: 3666 + 78 = 3744
Step 49: 3744 + 78 = 3822
Step 50: 3822 + 78 = 3900
Step 51: 3900 + 78 = 3978
Step 52: 3978 + 78 = 4056
Step 53: 4056 + 78 = 4134
Step 54: 4134 + 78 = 4212
Step 55: 4212 + 78 = 4290
Step 56: 4290 + 78 = 4368
Step 57: 4368 + 78 = 4446
Step 58: 4446 + 78 = 4524
Step 59: 4524 + 78 = 4602
Step 60: 4602 + 78 = 4680
Step 61: 4680 + 78 = 4758
Step 62: 4758 + 78 = 4836
Step 63: 4836 + 78 = 4914
Step 64: 4914 + 78 = 4992
Step 65: 4992 + 78 = 5070
Step 66: 5070 + 78 = 5148
Step 67: 5148 + 78 = 5226
Step 68: 5226 + 78 = 5304
Step 69: 5304 + 78 = 5382
Step 70: 5382 + 78 = 5460
Step 71: 5460 + 78 = 5538
Step 72: 5538 + 78 = 5616
Step 73: 5616 + 78 = 5694
Step 74: 5694 + 78 = 5772
Step 75: 5772 + 78 = 5850
Step 76: 5850 + 78 = 5928
Step 77: 5928 + 78 = 6006
Step 78: 6006 + 78 = 6084
Step 79: 6084 + 78 = 6162
Step 80: 6162 + 78 = 6240
Step 81: 6240 + 78 = 6318
Step 82: 6318 + 78 = 6396
Step 83: 6396 + 78 = 6474
Step 84: 6474 + 78 = 6552
Step 85: 6552 + 78 = 6630
Step 86: 6630 + 78 = 6708
Step 87: 6708 + 78 = 6786
Step 88: 6786 + 78 = 6864
Step 89: 6864 + 78 = 6942
Step 90: 6942 + 78 = 7020
Step 91: 7020 + 78 = 7098
Step 92: 7098 + 78 = 7176
Step 93: 7176 + 78 = 7254
Step 94: 7254 + 78 = 7332
Step 95: 7332 + 78 = 7410
Step 96: 7410 + 78 = 7488
Step 97: 7488 + 78 = 7566
Step 98: 7566 + 78 = 7644
Step 99: 7644 + 78 = 7722
Step 100: 7722 + 78 = 7800
Step 101: 7800 + 78 = 7878
Step 102: 7878 + 78 = 7956
Step 103: 7956 + 78 = 8034
Step 104: 8034 + 78 = 8112
Step 105: 8112 + 78 = 8190
Step 106: 8190 + 78 = 8268
Step 107: 8268 + 78 = 8346
Step 108: 8346 + 78 = 8424
Step 109: 8424 + 78 = 8502
Step 110: 8502 + 78 = 8580
Step 111: 8580 + 78 = 8658
Step 112: 8658 + 78 = 8736
Step 113: 8736 + 78 = 8814
Step 114: 8814 + 78 = 8892
Step 115: 8892 + 78 = 8970
Step 116: 8970 + 78 = 9048
Step 117: 9048 + 78 = 9126
Step 118: 9126 + 78 = 9204
Step 119: 9204 + 78 = 9282
Step 120: 9282 + 78 = 9360
Step 121: 9360 + 78 = 9438
Step 122: 9438 + 78 = 9516
Step 123: 9516 + 78 = 9594
Step 124: 9594 + 78 = 9672
Step 125: 9672 + 78 = 9750
Step 126: 9750 + 78 = 9828
Step 127: 9828 + 78 = 9906
Step 128: 9906 + 78 = 9984
Step 129: 9984 + 78 = 10062
Step 130: 10062 + 78 = 10140
Step 131: 10140 + 78 = 10218
Step 132: 10218 + 78 = 10296
Step 133: 10296 + 78 = 10374
Step 134: 10374 + 78 = 10452
Step 135: 10452 + 78 = 10530
Step 136: 10530 + 78 = 10608
Step 137: 10608 + 78 = 10686
Step 138: 10686 + 78 = 10764
Step 139: 10764 + 78 = 10842
Step 140: 10842 + 78 = 10920
Step 141: 10920 + 78 = 10998
Step 142: 10998 + 78 = 11076
Step 143: 11076 + 78 = 11154
Step 144: 11154 + 78 = 11232
Step 145: 11232 + 78 = 11310
Step 146: 11310 + 78 = 11388
Step 147: 11388 + 78 = 11466
Step 148: 11466 + 78 = 11544
Step 149: 11544 + 78 = 11622
Step 150: 11622 + 78 = 11700
Step 151: 11700 + 78 = 11778
Step 152: 11778 + 78 = 11856
Step 153: 11856 + 78 = 11934
Step 154: 11934 + 78 = 12012
Step 155: 12012 + 78 = 12090
Step 156: 12090 + 78 = 12168
Step 157: 12168 + 78 = 12246
Step 158: 12246 + 78 = 12324
Step 159: 12324 + 78 = 12402
Step 160: 12402 + 78 = 12480
Step 161: 12480 + 78 = 12558
Step 162: 12558 + 78 = 12636
Step 163: 12636 + 78 = 12714
Step 164: 12714 + 78 = 12792
Step 165: 12792 + 78 = 12870
Step 166: 12870 + 78 = 12948
Step 167: 12948 + 78 = 13026
Step 168: 13026 + 78 = 13104
Step 169: 13104 + 78 = 13182
Step 170: 13182 + 78 = 13260
Step 171: 13260 + 78 = 13338
Step 172: 13338 + 78 = 13416
Step 173: 13416 + 78 = 13494
Step 174: 13494 + 78 = 13572
Step 175: 13572 + 78 = 13650
Step 176: 13650 + 78 = 13728
Step 177: 13728 + 78 = 13806
Step 178: 13806 + 78 = 13884
Step 179: 13884 + 78 = 13962
Step 180: 13962 + 78 = 14040
Step 181: 14040 + 78 = 14118
Step 182: 14118 + 78 = 14196
Step 183: 14196 + 78 = 14274
Step 184: 14274 + 78 = 14352
Step 185: 14352 + 78 = 14430
Step 186: 14430 + 78 = 14508
Step 187: 14508 + 78 = 14586
Step 188: 14586 + 78 = 14664
Step 189: 14664 + 78 = 14742
Step 190: 14742 + 78 = 14820
Step 191: 14820 + 78 = 14898
Step 192: 14898 + 78 = 14976
Step 193: 14976 + 78 = 15054
Step 194: 15054 + 78 = 15132
Step 195: 15132 + 78 = 15210
Step 196: 15210 + 78 = 15288
Step 197: 15288 + 78 = 15366
Step 198: 15366 + 78 = 15444
Step 199: 15444 + 78 = 15522
Step 200: 15522 + 78 = 15600
Step 201: 15600 + 78 = 15678
Step 202: 15678 + 78 = 15756
Step 203: 15756 + 78 = 15834
Step 204: 15834 + 78 = 15912
Step 205: 15912 + 78 = 15990
Step 206: 15990 + 78 = 16068
Step 207: 16068 + 78 = 16146
Step 208: 16146 + 78 = 16224
Step 209: 16224 + 78 = 16302
Step 210: 16302 + 78 = 16380
Step 211: 16380 + 78 = 16458
Step 212: 16458 + 78 = 16536
Step 213: 16536 + 78 = 16614
Step 214: 16614 + 78 = 16692
Step 215: 16692 + 78 = 16770
Step 216: 16770 + 78 = 16848
Step 217: 16848 + 78 = 16926
Step 218: 16926 + 78 = 17004
Step 219: 17004 + 78 = 17082
Step 220: 17082 + 78 = 17160
Step 221: 17160 + 78 = 17238
Step 222: 17238 + 78 = 17316
Step 223: 17316 + 78 = 17394
Step 224: 17394 + 78 = 17472
Step 225: 17472 + 78 = 17550
Step 226: 17550 + 78 = 17628
Step 227: 17628 + 78 = 17706
Step 228: 17706 + 78 = 17784
Step 229: 17784 + 78 = 17862
Step 230: 17862 + 78 = 17940
Step 231: 17940 + 78 = 18018
Step 232: 18018 + 78 = 18096
Step 233: 18096 + 78 = 18174
Step 234: 18174 + 78 = 18252
Step 235: 18252 + 78 = 18330
Step 236: 18330 + 78 = 18408
Step 237: 18408 + 78 = 18486
Step 238: 18486 + 78 = 18564
Step 239: 18564 + 78 = 18642

So, 78*239 = 18642