OK, let's work through this together. We're starting with 259 and we're going to multiply it by 260, which means we add 259 to itself 260 times.
Step 1: 0 + 259 = 259
Step 2: 259 + 259 = 518
Step 3: 518 + 259 = 777
Step 4: 777 + 259 = 1036
Step 5: 1036 + 259 = 1295
Step 6: 1295 + 259 = 1554
Step 7: 1554 + 259 = 1813
Step 8: 1813 + 259 = 2072
Step 9: 2072 + 259 = 2331
Step 10: 2331 + 259 = 2590
Step 11: 2590 + 259 = 2849
Step 12: 2849 + 259 = 3108
Step 13: 3108 + 259 = 3367
Step 14: 3367 + 259 = 3626
Step 15: 3626 + 259 = 3885
Step 16: 3885 + 259 = 4144
Step 17: 4144 + 259 = 4403
Step 18: 4403 + 259 = 4662
Step 19: 4662 + 259 = 4921
Step 20: 4921 + 259 = 5180
Step 21: 5180 + 259 = 5439
Step 22: 5439 + 259 = 5698
Step 23: 5698 + 259 = 5957
Step 24: 5957 + 259 = 6216
Step 25: 6216 + 259 = 6475
Step 26: 6475 + 259 = 6734
Step 27: 6734 + 259 = 6993
Step 28: 6993 + 259 = 7252
Step 29: 7252 + 259 = 7511
Step 30: 7511 + 259 = 7770
Step 31: 7770 + 259 = 8029
Step 32: 8029 + 259 = 8288
Step 33: 8288 + 259 = 8547
Step 34: 8547 + 259 = 8806
Step 35: 8806 + 259 = 9065
Step 36: 9065 + 259 = 9324
Step 37: 9324 + 259 = 9583
Step 38: 9583 + 259 = 9842
Step 39: 9842 + 259 = 10101
Step 40: 10101 + 259 = 10360
Step 41: 10360 + 259 = 10619
Step 42: 10619 + 259 = 10878
Step 43: 10878 + 259 = 11137
Step 44: 11137 + 259 = 11396
Step 45: 11396 + 259 = 11655
Step 46: 11655 + 259 = 11914
Step 47: 11914 + 259 = 12173
Step 48: 12173 + 259 = 12432
Step 49: 12432 + 259 = 12691
Step 50: 12691 + 259 = 12950
Step 51: 12950 + 259 = 13209
Step 52: 13209 + 259 = 13468
Step 53: 13468 + 259 = 13727
Step 54: 13727 + 259 = 13986
Step 55: 13986 + 259 = 14245
Step 56: 14245 + 259 = 14504
Step 57: 14504 + 259 = 14763
Step 58: 14763 + 259 = 15022
Step 59: 15022 + 259 = 15281
Step 60: 15281 + 259 = 15540
Step 61: 15540 + 259 = 15799
Step 62: 15799 + 259 = 16058
Step 63: 16058 + 259 = 16317
Step 64: 16317 + 259 = 16576
Step 65: 16576 + 259 = 16835
Step 66: 16835 + 259 = 17094
Step 67: 17094 + 259 = 17353
Step 68: 17353 + 259 = 17612
Step 69: 17612 + 259 = 17871
Step 70: 17871 + 259 = 18130
Step 71: 18130 + 259 = 18389
Step 72: 18389 + 259 = 18648
Step 73: 18648 + 259 = 18907
Step 74: 18907 + 259 = 19166
Step 75: 19166 + 259 = 19425
Step 76: 19425 + 259 = 19684
Step 77: 19684 + 259 = 19943
Step 78: 19943 + 259 = 20202
Step 79: 20202 + 259 = 20461
Step 80: 20461 + 259 = 20720
Step 81: 20720 + 259 = 20979
Step 82: 20979 + 259 = 21238
Step 83: 21238 + 259 = 21497
Step 84: 21497 + 259 = 21756
Step 85: 21756 + 259 = 22015
Step 86: 22015 + 259 = 22274
Step 87: 22274 + 259 = 22533
Step 88: 22533 + 259 = 22792
Step 89: 22792 + 259 = 23051
Step 90: 23051 + 259 = 23310
Step 91: 23310 + 259 = 23569
Step 92: 23569 + 259 = 23828
Step 93: 23828 + 259 = 24087
Step 94: 24087 + 259 = 24346
Step 95: 24346 + 259 = 24605
Step 96: 24605 + 259 = 24864
Step 97: 24864 + 259 = 25123
Step 98: 25123 + 259 = 25382
Step 99: 25382 + 259 = 25641
Step 100: 25641 + 259 = 25900
Step 101: 25900 + 259 = 26159
Step 102: 26159 + 259 = 26418
Step 103: 26418 + 259 = 26677
Step 104: 26677 + 259 = 26936
Step 105: 26936 + 259 = 27195
Step 106: 27195 + 259 = 27454
Step 107: 27454 + 259 = 27713
Step 108: 27713 + 259 = 27972
Step 109: 27972 + 259 = 28231
Step 110: 28231 + 259 = 28490
Step 111: 28490 + 259 = 28749
Step 112: 28749 + 259 = 29008
Step 113: 29008 + 259 = 29267
Step 114: 29267 + 259 = 29526
Step 115: 29526 + 259 = 29785
Step 116: 29785 + 259 = 30044
Step 117: 30044 + 259 = 30303
Step 118: 30303 + 259 = 30562
Step 119: 30562 + 259 = 30821
Step 120: 30821 + 259 = 31080
Step 121: 31080 + 259 = 31339
Step 122: 31339 + 259 = 31598
Step 123: 31598 + 259 = 31857
Step 124: 31857 + 259 = 32116
Step 125: 32116 + 259 = 32375
Step 126: 32375 + 259 = 32634
Step 127: 32634 + 259 = 32893
Step 128: 32893 + 259 = 33152
Step 129: 33152 + 259 = 33411
Step 130: 33411 + 259 = 33670
Step 131: 33670 + 259 = 33929
Step 132: 33929 + 259 = 34188
Step 133: 34188 + 259 = 34447
Step 134: 34447 + 259 = 34706
Step 135: 34706 + 259 = 34965
Step 136: 34965 + 259 = 35224
Step 137: 35224 + 259 = 35483
Step 138: 35483 + 259 = 35742
Step 139: 35742 + 259 = 36001
Step 140: 36001 + 259 = 36260
Step 141: 36260 + 259 = 36519
Step 142: 36519 + 259 = 36778
Step 143: 36778 + 259 = 37037
Step 144: 37037 + 259 = 37296
Step 145: 37296 + 259 = 37555
Step 146: 37555 + 259 = 37814
Step 147: 37814 + 259 = 38073
Step 148: 38073 + 259 = 38332
Step 149: 38332 + 259 = 38591
Step 150: 38591 + 259 = 38850
Step 151: 38850 + 259 = 39109
Step 152: 39109 + 259 = 39368
Step 153: 39368 + 259 = 39627
Step 154: 39627 + 259 = 39886
Step 155: 39886 + 259 = 40145
Step 156: 40145 + 259 = 40404
Step 157: 40404 + 259 = 40663
Step 158: 40663 + 259 = 40922
Step 159: 40922 + 259 = 41181
Step 160: 41181 + 259 = 41440
Step 161: 41440 + 259 = 41699
Step 162: 41699 + 259 = 41958
Step 163: 41958 + 259 = 42217
Step 164: 42217 + 259 = 42476
Step 165: 42476 + 259 = 42735
Step 166: 42735 + 259 = 42994
Step 167: 42994 + 259 = 43253
Step 168: 43253 + 259 = 43512
Step 169: 43512 + 259 = 43771
Step 170: 43771 + 259 = 44030
Step 171: 44030 + 259 = 44289
Step 172: 44289 + 259 = 44548
Step 173: 44548 + 259 = 44807
Step 174: 44807 + 259 = 45066
Step 175: 45066 + 259 = 45325
Step 176: 45325 + 259 = 45584
Step 177: 45584 + 259 = 45843
Step 178: 45843 + 259 = 46102
Step 179: 46102 + 259 = 46361
Step 180: 46361 + 259 = 46620
Step 181: 46620 + 259 = 46879
Step 182: 46879 + 259 = 47138
Step 183: 47138 + 259 = 47397
Step 184: 47397 + 259 = 47656
Step 185: 47656 + 259 = 47915
Step 186: 47915 + 259 = 48174
Step 187: 48174 + 259 = 48433
Step 188: 48433 + 259 = 48692
Step 189: 48692 + 259 = 48951
Step 190: 48951 + 259 = 49210
Step 191: 49210 + 259 = 49469
Step 192: 49469 + 259 = 49728
Step 193: 49728 + 259 = 49987
Step 194: 49987 + 259 = 50246
Step 195: 50246 + 259 = 50505
Step 196: 50505 + 259 = 50764
Step 197: 50764 + 259 = 51023
Step 198: 51023 + 259 = 51282
Step 199: 51282 + 259 = 51541
Step 200: 51541 + 259 = 51800
Step 201: 51800 + 259 = 52059
Step 202: 52059 + 259 = 52318
Step 203: 52318 + 259 = 52577
Step 204: 52577 + 259 = 52836
Step 205: 52836 + 259 = 53095
Step 206: 53095 + 259 = 53354
Step 207: 53354 + 259 = 53613
Step 208: 53613 + 259 = 53872
Step 209: 53872 + 259 = 54131
Step 210: 54131 + 259 = 54390
Step 211: 54390 + 259 = 54649
Step 212: 54649 + 259 = 54908
Step 213: 54908 + 259 = 55167
Step 214: 55167 + 259 = 55426
Step 215: 55426 + 259 = 55685
Step 216: 55685 + 259 = 55944
Step 217: 55944 + 259 = 56203
Step 218: 56203 + 259 = 56462
Step 219: 56462 + 259 = 56721
Step 220: 56721 + 259 = 56980
Step 221: 56980 + 259 = 57239
Step 222: 57239 + 259 = 57498
Step 223: 57498 + 259 = 57757
Step 224: 57757 + 259 = 58016
Step 225: 58016 + 259 = 58275
Step 226: 58275 + 259 = 58534
Step 227: 58534 + 259 = 58793
Step 228: 58793 + 259 = 59052
Step 229: 59052 + 259 = 59311
Step 230: 59311 + 259 = 59570
Step 231: 59570 + 259 = 59829
Step 232: 59829 + 259 = 60088
Step 233: 60088 + 259 = 60347
Step 234: 60347 + 259 = 60606
Step 235: 60606 + 259 = 60865
Step 236: 60865 + 259 = 61124
Step 237: 61124 + 259 = 61383
Step 238: 61383 + 259 = 61642
Step 239: 61642 + 259 = 61901
Step 240: 61901 + 259 = 62160
Step 241: 62160 + 259 = 62419
Step 242: 62419 + 259 = 62678
Step 243: 62678 + 259 = 62937
Step 244: 62937 + 259 = 63196
Step 245: 63196 + 259 = 63455
Step 246: 63455 + 259 = 63714
Step 247: 63714 + 259 = 63973
Step 248: 63973 + 259 = 64232
Step 249: 64232 + 259 = 64491
Step 250: 64491 + 259 = 64750
Step 251: 64750 + 259 = 65009
Step 252: 65009 + 259 = 65268
Step 253: 65268 + 259 = 65527
Step 254: 65527 + 259 = 65786
Step 255: 65786 + 259 = 66045
Step 256: 66045 + 259 = 66304
Step 257: 66304 + 259 = 66563
Step 258: 66563 + 259 = 66822
Step 259: 66822 + 259 = 67081
Step 260: 67081 + 259 = 67340

So, 259*260 = 67340