Alright, let's solve this math problem step by step. First, we have the number 686. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 258. So, we're going to take the number 686 and add it to itself 258 times.
Step 1: 0 + 686 = 686
Step 2: 686 + 686 = 1372
Step 3: 1372 + 686 = 2058
Step 4: 2058 + 686 = 2744
Step 5: 2744 + 686 = 3430
Step 6: 3430 + 686 = 4116
Step 7: 4116 + 686 = 4802
Step 8: 4802 + 686 = 5488
Step 9: 5488 + 686 = 6174
Step 10: 6174 + 686 = 6860
Step 11: 6860 + 686 = 7546
Step 12: 7546 + 686 = 8232
Step 13: 8232 + 686 = 8918
Step 14: 8918 + 686 = 9604
Step 15: 9604 + 686 = 10290
Step 16: 10290 + 686 = 10976
Step 17: 10976 + 686 = 11662
Step 18: 11662 + 686 = 12348
Step 19: 12348 + 686 = 13034
Step 20: 13034 + 686 = 13720
Step 21: 13720 + 686 = 14406
Step 22: 14406 + 686 = 15092
Step 23: 15092 + 686 = 15778
Step 24: 15778 + 686 = 16464
Step 25: 16464 + 686 = 17150
Step 26: 17150 + 686 = 17836
Step 27: 17836 + 686 = 18522
Step 28: 18522 + 686 = 19208
Step 29: 19208 + 686 = 19894
Step 30: 19894 + 686 = 20580
Step 31: 20580 + 686 = 21266
Step 32: 21266 + 686 = 21952
Step 33: 21952 + 686 = 22638
Step 34: 22638 + 686 = 23324
Step 35: 23324 + 686 = 24010
Step 36: 24010 + 686 = 24696
Step 37: 24696 + 686 = 25382
Step 38: 25382 + 686 = 26068
Step 39: 26068 + 686 = 26754
Step 40: 26754 + 686 = 27440
Step 41: 27440 + 686 = 28126
Step 42: 28126 + 686 = 28812
Step 43: 28812 + 686 = 29498
Step 44: 29498 + 686 = 30184
Step 45: 30184 + 686 = 30870
Step 46: 30870 + 686 = 31556
Step 47: 31556 + 686 = 32242
Step 48: 32242 + 686 = 32928
Step 49: 32928 + 686 = 33614
Step 50: 33614 + 686 = 34300
Step 51: 34300 + 686 = 34986
Step 52: 34986 + 686 = 35672
Step 53: 35672 + 686 = 36358
Step 54: 36358 + 686 = 37044
Step 55: 37044 + 686 = 37730
Step 56: 37730 + 686 = 38416
Step 57: 38416 + 686 = 39102
Step 58: 39102 + 686 = 39788
Step 59: 39788 + 686 = 40474
Step 60: 40474 + 686 = 41160
Step 61: 41160 + 686 = 41846
Step 62: 41846 + 686 = 42532
Step 63: 42532 + 686 = 43218
Step 64: 43218 + 686 = 43904
Step 65: 43904 + 686 = 44590
Step 66: 44590 + 686 = 45276
Step 67: 45276 + 686 = 45962
Step 68: 45962 + 686 = 46648
Step 69: 46648 + 686 = 47334
Step 70: 47334 + 686 = 48020
Step 71: 48020 + 686 = 48706
Step 72: 48706 + 686 = 49392
Step 73: 49392 + 686 = 50078
Step 74: 50078 + 686 = 50764
Step 75: 50764 + 686 = 51450
Step 76: 51450 + 686 = 52136
Step 77: 52136 + 686 = 52822
Step 78: 52822 + 686 = 53508
Step 79: 53508 + 686 = 54194
Step 80: 54194 + 686 = 54880
Step 81: 54880 + 686 = 55566
Step 82: 55566 + 686 = 56252
Step 83: 56252 + 686 = 56938
Step 84: 56938 + 686 = 57624
Step 85: 57624 + 686 = 58310
Step 86: 58310 + 686 = 58996
Step 87: 58996 + 686 = 59682
Step 88: 59682 + 686 = 60368
Step 89: 60368 + 686 = 61054
Step 90: 61054 + 686 = 61740
Step 91: 61740 + 686 = 62426
Step 92: 62426 + 686 = 63112
Step 93: 63112 + 686 = 63798
Step 94: 63798 + 686 = 64484
Step 95: 64484 + 686 = 65170
Step 96: 65170 + 686 = 65856
Step 97: 65856 + 686 = 66542
Step 98: 66542 + 686 = 67228
Step 99: 67228 + 686 = 67914
Step 100: 67914 + 686 = 68600
Step 101: 68600 + 686 = 69286
Step 102: 69286 + 686 = 69972
Step 103: 69972 + 686 = 70658
Step 104: 70658 + 686 = 71344
Step 105: 71344 + 686 = 72030
Step 106: 72030 + 686 = 72716
Step 107: 72716 + 686 = 73402
Step 108: 73402 + 686 = 74088
Step 109: 74088 + 686 = 74774
Step 110: 74774 + 686 = 75460
Step 111: 75460 + 686 = 76146
Step 112: 76146 + 686 = 76832
Step 113: 76832 + 686 = 77518
Step 114: 77518 + 686 = 78204
Step 115: 78204 + 686 = 78890
Step 116: 78890 + 686 = 79576
Step 117: 79576 + 686 = 80262
Step 118: 80262 + 686 = 80948
Step 119: 80948 + 686 = 81634
Step 120: 81634 + 686 = 82320
Step 121: 82320 + 686 = 83006
Step 122: 83006 + 686 = 83692
Step 123: 83692 + 686 = 84378
Step 124: 84378 + 686 = 85064
Step 125: 85064 + 686 = 85750
Step 126: 85750 + 686 = 86436
Step 127: 86436 + 686 = 87122
Step 128: 87122 + 686 = 87808
Step 129: 87808 + 686 = 88494
Step 130: 88494 + 686 = 89180
Step 131: 89180 + 686 = 89866
Step 132: 89866 + 686 = 90552
Step 133: 90552 + 686 = 91238
Step 134: 91238 + 686 = 91924
Step 135: 91924 + 686 = 92610
Step 136: 92610 + 686 = 93296
Step 137: 93296 + 686 = 93982
Step 138: 93982 + 686 = 94668
Step 139: 94668 + 686 = 95354
Step 140: 95354 + 686 = 96040
Step 141: 96040 + 686 = 96726
Step 142: 96726 + 686 = 97412
Step 143: 97412 + 686 = 98098
Step 144: 98098 + 686 = 98784
Step 145: 98784 + 686 = 99470
Step 146: 99470 + 686 = 100156
Step 147: 100156 + 686 = 100842
Step 148: 100842 + 686 = 101528
Step 149: 101528 + 686 = 102214
Step 150: 102214 + 686 = 102900
Step 151: 102900 + 686 = 103586
Step 152: 103586 + 686 = 104272
Step 153: 104272 + 686 = 104958
Step 154: 104958 + 686 = 105644
Step 155: 105644 + 686 = 106330
Step 156: 106330 + 686 = 107016
Step 157: 107016 + 686 = 107702
Step 158: 107702 + 686 = 108388
Step 159: 108388 + 686 = 109074
Step 160: 109074 + 686 = 109760
Step 161: 109760 + 686 = 110446
Step 162: 110446 + 686 = 111132
Step 163: 111132 + 686 = 111818
Step 164: 111818 + 686 = 112504
Step 165: 112504 + 686 = 113190
Step 166: 113190 + 686 = 113876
Step 167: 113876 + 686 = 114562
Step 168: 114562 + 686 = 115248
Step 169: 115248 + 686 = 115934
Step 170: 115934 + 686 = 116620
Step 171: 116620 + 686 = 117306
Step 172: 117306 + 686 = 117992
Step 173: 117992 + 686 = 118678
Step 174: 118678 + 686 = 119364
Step 175: 119364 + 686 = 120050
Step 176: 120050 + 686 = 120736
Step 177: 120736 + 686 = 121422
Step 178: 121422 + 686 = 122108
Step 179: 122108 + 686 = 122794
Step 180: 122794 + 686 = 123480
Step 181: 123480 + 686 = 124166
Step 182: 124166 + 686 = 124852
Step 183: 124852 + 686 = 125538
Step 184: 125538 + 686 = 126224
Step 185: 126224 + 686 = 126910
Step 186: 126910 + 686 = 127596
Step 187: 127596 + 686 = 128282
Step 188: 128282 + 686 = 128968
Step 189: 128968 + 686 = 129654
Step 190: 129654 + 686 = 130340
Step 191: 130340 + 686 = 131026
Step 192: 131026 + 686 = 131712
Step 193: 131712 + 686 = 132398
Step 194: 132398 + 686 = 133084
Step 195: 133084 + 686 = 133770
Step 196: 133770 + 686 = 134456
Step 197: 134456 + 686 = 135142
Step 198: 135142 + 686 = 135828
Step 199: 135828 + 686 = 136514
Step 200: 136514 + 686 = 137200
Step 201: 137200 + 686 = 137886
Step 202: 137886 + 686 = 138572
Step 203: 138572 + 686 = 139258
Step 204: 139258 + 686 = 139944
Step 205: 139944 + 686 = 140630
Step 206: 140630 + 686 = 141316
Step 207: 141316 + 686 = 142002
Step 208: 142002 + 686 = 142688
Step 209: 142688 + 686 = 143374
Step 210: 143374 + 686 = 144060
Step 211: 144060 + 686 = 144746
Step 212: 144746 + 686 = 145432
Step 213: 145432 + 686 = 146118
Step 214: 146118 + 686 = 146804
Step 215: 146804 + 686 = 147490
Step 216: 147490 + 686 = 148176
Step 217: 148176 + 686 = 148862
Step 218: 148862 + 686 = 149548
Step 219: 149548 + 686 = 150234
Step 220: 150234 + 686 = 150920
Step 221: 150920 + 686 = 151606
Step 222: 151606 + 686 = 152292
Step 223: 152292 + 686 = 152978
Step 224: 152978 + 686 = 153664
Step 225: 153664 + 686 = 154350
Step 226: 154350 + 686 = 155036
Step 227: 155036 + 686 = 155722
Step 228: 155722 + 686 = 156408
Step 229: 156408 + 686 = 157094
Step 230: 157094 + 686 = 157780
Step 231: 157780 + 686 = 158466
Step 232: 158466 + 686 = 159152
Step 233: 159152 + 686 = 159838
Step 234: 159838 + 686 = 160524
Step 235: 160524 + 686 = 161210
Step 236: 161210 + 686 = 161896
Step 237: 161896 + 686 = 162582
Step 238: 162582 + 686 = 163268
Step 239: 163268 + 686 = 163954
Step 240: 163954 + 686 = 164640
Step 241: 164640 + 686 = 165326
Step 242: 165326 + 686 = 166012
Step 243: 166012 + 686 = 166698
Step 244: 166698 + 686 = 167384
Step 245: 167384 + 686 = 168070
Step 246: 168070 + 686 = 168756
Step 247: 168756 + 686 = 169442
Step 248: 169442 + 686 = 170128
Step 249: 170128 + 686 = 170814
Step 250: 170814 + 686 = 171500
Step 251: 171500 + 686 = 172186
Step 252: 172186 + 686 = 172872
Step 253: 172872 + 686 = 173558
Step 254: 173558 + 686 = 174244
Step 255: 174244 + 686 = 174930
Step 256: 174930 + 686 = 175616
Step 257: 175616 + 686 = 176302
Step 258: 176302 + 686 = 176988

So, 686*258 = 176988