OK, let's crack this. We're given 789 and our task is to multiply it by 263. Essentially, we'll be adding 789 to itself 263 times.
Step 1: 0 + 789 = 789
Step 2: 789 + 789 = 1578
Step 3: 1578 + 789 = 2367
Step 4: 2367 + 789 = 3156
Step 5: 3156 + 789 = 3945
Step 6: 3945 + 789 = 4734
Step 7: 4734 + 789 = 5523
Step 8: 5523 + 789 = 6312
Step 9: 6312 + 789 = 7101
Step 10: 7101 + 789 = 7890
Step 11: 7890 + 789 = 8679
Step 12: 8679 + 789 = 9468
Step 13: 9468 + 789 = 10257
Step 14: 10257 + 789 = 11046
Step 15: 11046 + 789 = 11835
Step 16: 11835 + 789 = 12624
Step 17: 12624 + 789 = 13413
Step 18: 13413 + 789 = 14202
Step 19: 14202 + 789 = 14991
Step 20: 14991 + 789 = 15780
Step 21: 15780 + 789 = 16569
Step 22: 16569 + 789 = 17358
Step 23: 17358 + 789 = 18147
Step 24: 18147 + 789 = 18936
Step 25: 18936 + 789 = 19725
Step 26: 19725 + 789 = 20514
Step 27: 20514 + 789 = 21303
Step 28: 21303 + 789 = 22092
Step 29: 22092 + 789 = 22881
Step 30: 22881 + 789 = 23670
Step 31: 23670 + 789 = 24459
Step 32: 24459 + 789 = 25248
Step 33: 25248 + 789 = 26037
Step 34: 26037 + 789 = 26826
Step 35: 26826 + 789 = 27615
Step 36: 27615 + 789 = 28404
Step 37: 28404 + 789 = 29193
Step 38: 29193 + 789 = 29982
Step 39: 29982 + 789 = 30771
Step 40: 30771 + 789 = 31560
Step 41: 31560 + 789 = 32349
Step 42: 32349 + 789 = 33138
Step 43: 33138 + 789 = 33927
Step 44: 33927 + 789 = 34716
Step 45: 34716 + 789 = 35505
Step 46: 35505 + 789 = 36294
Step 47: 36294 + 789 = 37083
Step 48: 37083 + 789 = 37872
Step 49: 37872 + 789 = 38661
Step 50: 38661 + 789 = 39450
Step 51: 39450 + 789 = 40239
Step 52: 40239 + 789 = 41028
Step 53: 41028 + 789 = 41817
Step 54: 41817 + 789 = 42606
Step 55: 42606 + 789 = 43395
Step 56: 43395 + 789 = 44184
Step 57: 44184 + 789 = 44973
Step 58: 44973 + 789 = 45762
Step 59: 45762 + 789 = 46551
Step 60: 46551 + 789 = 47340
Step 61: 47340 + 789 = 48129
Step 62: 48129 + 789 = 48918
Step 63: 48918 + 789 = 49707
Step 64: 49707 + 789 = 50496
Step 65: 50496 + 789 = 51285
Step 66: 51285 + 789 = 52074
Step 67: 52074 + 789 = 52863
Step 68: 52863 + 789 = 53652
Step 69: 53652 + 789 = 54441
Step 70: 54441 + 789 = 55230
Step 71: 55230 + 789 = 56019
Step 72: 56019 + 789 = 56808
Step 73: 56808 + 789 = 57597
Step 74: 57597 + 789 = 58386
Step 75: 58386 + 789 = 59175
Step 76: 59175 + 789 = 59964
Step 77: 59964 + 789 = 60753
Step 78: 60753 + 789 = 61542
Step 79: 61542 + 789 = 62331
Step 80: 62331 + 789 = 63120
Step 81: 63120 + 789 = 63909
Step 82: 63909 + 789 = 64698
Step 83: 64698 + 789 = 65487
Step 84: 65487 + 789 = 66276
Step 85: 66276 + 789 = 67065
Step 86: 67065 + 789 = 67854
Step 87: 67854 + 789 = 68643
Step 88: 68643 + 789 = 69432
Step 89: 69432 + 789 = 70221
Step 90: 70221 + 789 = 71010
Step 91: 71010 + 789 = 71799
Step 92: 71799 + 789 = 72588
Step 93: 72588 + 789 = 73377
Step 94: 73377 + 789 = 74166
Step 95: 74166 + 789 = 74955
Step 96: 74955 + 789 = 75744
Step 97: 75744 + 789 = 76533
Step 98: 76533 + 789 = 77322
Step 99: 77322 + 789 = 78111
Step 100: 78111 + 789 = 78900
Step 101: 78900 + 789 = 79689
Step 102: 79689 + 789 = 80478
Step 103: 80478 + 789 = 81267
Step 104: 81267 + 789 = 82056
Step 105: 82056 + 789 = 82845
Step 106: 82845 + 789 = 83634
Step 107: 83634 + 789 = 84423
Step 108: 84423 + 789 = 85212
Step 109: 85212 + 789 = 86001
Step 110: 86001 + 789 = 86790
Step 111: 86790 + 789 = 87579
Step 112: 87579 + 789 = 88368
Step 113: 88368 + 789 = 89157
Step 114: 89157 + 789 = 89946
Step 115: 89946 + 789 = 90735
Step 116: 90735 + 789 = 91524
Step 117: 91524 + 789 = 92313
Step 118: 92313 + 789 = 93102
Step 119: 93102 + 789 = 93891
Step 120: 93891 + 789 = 94680
Step 121: 94680 + 789 = 95469
Step 122: 95469 + 789 = 96258
Step 123: 96258 + 789 = 97047
Step 124: 97047 + 789 = 97836
Step 125: 97836 + 789 = 98625
Step 126: 98625 + 789 = 99414
Step 127: 99414 + 789 = 100203
Step 128: 100203 + 789 = 100992
Step 129: 100992 + 789 = 101781
Step 130: 101781 + 789 = 102570
Step 131: 102570 + 789 = 103359
Step 132: 103359 + 789 = 104148
Step 133: 104148 + 789 = 104937
Step 134: 104937 + 789 = 105726
Step 135: 105726 + 789 = 106515
Step 136: 106515 + 789 = 107304
Step 137: 107304 + 789 = 108093
Step 138: 108093 + 789 = 108882
Step 139: 108882 + 789 = 109671
Step 140: 109671 + 789 = 110460
Step 141: 110460 + 789 = 111249
Step 142: 111249 + 789 = 112038
Step 143: 112038 + 789 = 112827
Step 144: 112827 + 789 = 113616
Step 145: 113616 + 789 = 114405
Step 146: 114405 + 789 = 115194
Step 147: 115194 + 789 = 115983
Step 148: 115983 + 789 = 116772
Step 149: 116772 + 789 = 117561
Step 150: 117561 + 789 = 118350
Step 151: 118350 + 789 = 119139
Step 152: 119139 + 789 = 119928
Step 153: 119928 + 789 = 120717
Step 154: 120717 + 789 = 121506
Step 155: 121506 + 789 = 122295
Step 156: 122295 + 789 = 123084
Step 157: 123084 + 789 = 123873
Step 158: 123873 + 789 = 124662
Step 159: 124662 + 789 = 125451
Step 160: 125451 + 789 = 126240
Step 161: 126240 + 789 = 127029
Step 162: 127029 + 789 = 127818
Step 163: 127818 + 789 = 128607
Step 164: 128607 + 789 = 129396
Step 165: 129396 + 789 = 130185
Step 166: 130185 + 789 = 130974
Step 167: 130974 + 789 = 131763
Step 168: 131763 + 789 = 132552
Step 169: 132552 + 789 = 133341
Step 170: 133341 + 789 = 134130
Step 171: 134130 + 789 = 134919
Step 172: 134919 + 789 = 135708
Step 173: 135708 + 789 = 136497
Step 174: 136497 + 789 = 137286
Step 175: 137286 + 789 = 138075
Step 176: 138075 + 789 = 138864
Step 177: 138864 + 789 = 139653
Step 178: 139653 + 789 = 140442
Step 179: 140442 + 789 = 141231
Step 180: 141231 + 789 = 142020
Step 181: 142020 + 789 = 142809
Step 182: 142809 + 789 = 143598
Step 183: 143598 + 789 = 144387
Step 184: 144387 + 789 = 145176
Step 185: 145176 + 789 = 145965
Step 186: 145965 + 789 = 146754
Step 187: 146754 + 789 = 147543
Step 188: 147543 + 789 = 148332
Step 189: 148332 + 789 = 149121
Step 190: 149121 + 789 = 149910
Step 191: 149910 + 789 = 150699
Step 192: 150699 + 789 = 151488
Step 193: 151488 + 789 = 152277
Step 194: 152277 + 789 = 153066
Step 195: 153066 + 789 = 153855
Step 196: 153855 + 789 = 154644
Step 197: 154644 + 789 = 155433
Step 198: 155433 + 789 = 156222
Step 199: 156222 + 789 = 157011
Step 200: 157011 + 789 = 157800
Step 201: 157800 + 789 = 158589
Step 202: 158589 + 789 = 159378
Step 203: 159378 + 789 = 160167
Step 204: 160167 + 789 = 160956
Step 205: 160956 + 789 = 161745
Step 206: 161745 + 789 = 162534
Step 207: 162534 + 789 = 163323
Step 208: 163323 + 789 = 164112
Step 209: 164112 + 789 = 164901
Step 210: 164901 + 789 = 165690
Step 211: 165690 + 789 = 166479
Step 212: 166479 + 789 = 167268
Step 213: 167268 + 789 = 168057
Step 214: 168057 + 789 = 168846
Step 215: 168846 + 789 = 169635
Step 216: 169635 + 789 = 170424
Step 217: 170424 + 789 = 171213
Step 218: 171213 + 789 = 172002
Step 219: 172002 + 789 = 172791
Step 220: 172791 + 789 = 173580
Step 221: 173580 + 789 = 174369
Step 222: 174369 + 789 = 175158
Step 223: 175158 + 789 = 175947
Step 224: 175947 + 789 = 176736
Step 225: 176736 + 789 = 177525
Step 226: 177525 + 789 = 178314
Step 227: 178314 + 789 = 179103
Step 228: 179103 + 789 = 179892
Step 229: 179892 + 789 = 180681
Step 230: 180681 + 789 = 181470
Step 231: 181470 + 789 = 182259
Step 232: 182259 + 789 = 183048
Step 233: 183048 + 789 = 183837
Step 234: 183837 + 789 = 184626
Step 235: 184626 + 789 = 185415
Step 236: 185415 + 789 = 186204
Step 237: 186204 + 789 = 186993
Step 238: 186993 + 789 = 187782
Step 239: 187782 + 789 = 188571
Step 240: 188571 + 789 = 189360
Step 241: 189360 + 789 = 190149
Step 242: 190149 + 789 = 190938
Step 243: 190938 + 789 = 191727
Step 244: 191727 + 789 = 192516
Step 245: 192516 + 789 = 193305
Step 246: 193305 + 789 = 194094
Step 247: 194094 + 789 = 194883
Step 248: 194883 + 789 = 195672
Step 249: 195672 + 789 = 196461
Step 250: 196461 + 789 = 197250
Step 251: 197250 + 789 = 198039
Step 252: 198039 + 789 = 198828
Step 253: 198828 + 789 = 199617
Step 254: 199617 + 789 = 200406
Step 255: 200406 + 789 = 201195
Step 256: 201195 + 789 = 201984
Step 257: 201984 + 789 = 202773
Step 258: 202773 + 789 = 203562
Step 259: 203562 + 789 = 204351
Step 260: 204351 + 789 = 205140
Step 261: 205140 + 789 = 205929
Step 262: 205929 + 789 = 206718
Step 263: 206718 + 789 = 207507

So, 789*263 = 207507