OK, let's crack this. We're given 666 and our task is to multiply it by 288. Essentially, we'll be adding 666 to itself 288 times.
Step 1: 0 + 666 = 666
Step 2: 666 + 666 = 1332
Step 3: 1332 + 666 = 1998
Step 4: 1998 + 666 = 2664
Step 5: 2664 + 666 = 3330
Step 6: 3330 + 666 = 3996
Step 7: 3996 + 666 = 4662
Step 8: 4662 + 666 = 5328
Step 9: 5328 + 666 = 5994
Step 10: 5994 + 666 = 6660
Step 11: 6660 + 666 = 7326
Step 12: 7326 + 666 = 7992
Step 13: 7992 + 666 = 8658
Step 14: 8658 + 666 = 9324
Step 15: 9324 + 666 = 9990
Step 16: 9990 + 666 = 10656
Step 17: 10656 + 666 = 11322
Step 18: 11322 + 666 = 11988
Step 19: 11988 + 666 = 12654
Step 20: 12654 + 666 = 13320
Step 21: 13320 + 666 = 13986
Step 22: 13986 + 666 = 14652
Step 23: 14652 + 666 = 15318
Step 24: 15318 + 666 = 15984
Step 25: 15984 + 666 = 16650
Step 26: 16650 + 666 = 17316
Step 27: 17316 + 666 = 17982
Step 28: 17982 + 666 = 18648
Step 29: 18648 + 666 = 19314
Step 30: 19314 + 666 = 19980
Step 31: 19980 + 666 = 20646
Step 32: 20646 + 666 = 21312
Step 33: 21312 + 666 = 21978
Step 34: 21978 + 666 = 22644
Step 35: 22644 + 666 = 23310
Step 36: 23310 + 666 = 23976
Step 37: 23976 + 666 = 24642
Step 38: 24642 + 666 = 25308
Step 39: 25308 + 666 = 25974
Step 40: 25974 + 666 = 26640
Step 41: 26640 + 666 = 27306
Step 42: 27306 + 666 = 27972
Step 43: 27972 + 666 = 28638
Step 44: 28638 + 666 = 29304
Step 45: 29304 + 666 = 29970
Step 46: 29970 + 666 = 30636
Step 47: 30636 + 666 = 31302
Step 48: 31302 + 666 = 31968
Step 49: 31968 + 666 = 32634
Step 50: 32634 + 666 = 33300
Step 51: 33300 + 666 = 33966
Step 52: 33966 + 666 = 34632
Step 53: 34632 + 666 = 35298
Step 54: 35298 + 666 = 35964
Step 55: 35964 + 666 = 36630
Step 56: 36630 + 666 = 37296
Step 57: 37296 + 666 = 37962
Step 58: 37962 + 666 = 38628
Step 59: 38628 + 666 = 39294
Step 60: 39294 + 666 = 39960
Step 61: 39960 + 666 = 40626
Step 62: 40626 + 666 = 41292
Step 63: 41292 + 666 = 41958
Step 64: 41958 + 666 = 42624
Step 65: 42624 + 666 = 43290
Step 66: 43290 + 666 = 43956
Step 67: 43956 + 666 = 44622
Step 68: 44622 + 666 = 45288
Step 69: 45288 + 666 = 45954
Step 70: 45954 + 666 = 46620
Step 71: 46620 + 666 = 47286
Step 72: 47286 + 666 = 47952
Step 73: 47952 + 666 = 48618
Step 74: 48618 + 666 = 49284
Step 75: 49284 + 666 = 49950
Step 76: 49950 + 666 = 50616
Step 77: 50616 + 666 = 51282
Step 78: 51282 + 666 = 51948
Step 79: 51948 + 666 = 52614
Step 80: 52614 + 666 = 53280
Step 81: 53280 + 666 = 53946
Step 82: 53946 + 666 = 54612
Step 83: 54612 + 666 = 55278
Step 84: 55278 + 666 = 55944
Step 85: 55944 + 666 = 56610
Step 86: 56610 + 666 = 57276
Step 87: 57276 + 666 = 57942
Step 88: 57942 + 666 = 58608
Step 89: 58608 + 666 = 59274
Step 90: 59274 + 666 = 59940
Step 91: 59940 + 666 = 60606
Step 92: 60606 + 666 = 61272
Step 93: 61272 + 666 = 61938
Step 94: 61938 + 666 = 62604
Step 95: 62604 + 666 = 63270
Step 96: 63270 + 666 = 63936
Step 97: 63936 + 666 = 64602
Step 98: 64602 + 666 = 65268
Step 99: 65268 + 666 = 65934
Step 100: 65934 + 666 = 66600
Step 101: 66600 + 666 = 67266
Step 102: 67266 + 666 = 67932
Step 103: 67932 + 666 = 68598
Step 104: 68598 + 666 = 69264
Step 105: 69264 + 666 = 69930
Step 106: 69930 + 666 = 70596
Step 107: 70596 + 666 = 71262
Step 108: 71262 + 666 = 71928
Step 109: 71928 + 666 = 72594
Step 110: 72594 + 666 = 73260
Step 111: 73260 + 666 = 73926
Step 112: 73926 + 666 = 74592
Step 113: 74592 + 666 = 75258
Step 114: 75258 + 666 = 75924
Step 115: 75924 + 666 = 76590
Step 116: 76590 + 666 = 77256
Step 117: 77256 + 666 = 77922
Step 118: 77922 + 666 = 78588
Step 119: 78588 + 666 = 79254
Step 120: 79254 + 666 = 79920
Step 121: 79920 + 666 = 80586
Step 122: 80586 + 666 = 81252
Step 123: 81252 + 666 = 81918
Step 124: 81918 + 666 = 82584
Step 125: 82584 + 666 = 83250
Step 126: 83250 + 666 = 83916
Step 127: 83916 + 666 = 84582
Step 128: 84582 + 666 = 85248
Step 129: 85248 + 666 = 85914
Step 130: 85914 + 666 = 86580
Step 131: 86580 + 666 = 87246
Step 132: 87246 + 666 = 87912
Step 133: 87912 + 666 = 88578
Step 134: 88578 + 666 = 89244
Step 135: 89244 + 666 = 89910
Step 136: 89910 + 666 = 90576
Step 137: 90576 + 666 = 91242
Step 138: 91242 + 666 = 91908
Step 139: 91908 + 666 = 92574
Step 140: 92574 + 666 = 93240
Step 141: 93240 + 666 = 93906
Step 142: 93906 + 666 = 94572
Step 143: 94572 + 666 = 95238
Step 144: 95238 + 666 = 95904
Step 145: 95904 + 666 = 96570
Step 146: 96570 + 666 = 97236
Step 147: 97236 + 666 = 97902
Step 148: 97902 + 666 = 98568
Step 149: 98568 + 666 = 99234
Step 150: 99234 + 666 = 99900
Step 151: 99900 + 666 = 100566
Step 152: 100566 + 666 = 101232
Step 153: 101232 + 666 = 101898
Step 154: 101898 + 666 = 102564
Step 155: 102564 + 666 = 103230
Step 156: 103230 + 666 = 103896
Step 157: 103896 + 666 = 104562
Step 158: 104562 + 666 = 105228
Step 159: 105228 + 666 = 105894
Step 160: 105894 + 666 = 106560
Step 161: 106560 + 666 = 107226
Step 162: 107226 + 666 = 107892
Step 163: 107892 + 666 = 108558
Step 164: 108558 + 666 = 109224
Step 165: 109224 + 666 = 109890
Step 166: 109890 + 666 = 110556
Step 167: 110556 + 666 = 111222
Step 168: 111222 + 666 = 111888
Step 169: 111888 + 666 = 112554
Step 170: 112554 + 666 = 113220
Step 171: 113220 + 666 = 113886
Step 172: 113886 + 666 = 114552
Step 173: 114552 + 666 = 115218
Step 174: 115218 + 666 = 115884
Step 175: 115884 + 666 = 116550
Step 176: 116550 + 666 = 117216
Step 177: 117216 + 666 = 117882
Step 178: 117882 + 666 = 118548
Step 179: 118548 + 666 = 119214
Step 180: 119214 + 666 = 119880
Step 181: 119880 + 666 = 120546
Step 182: 120546 + 666 = 121212
Step 183: 121212 + 666 = 121878
Step 184: 121878 + 666 = 122544
Step 185: 122544 + 666 = 123210
Step 186: 123210 + 666 = 123876
Step 187: 123876 + 666 = 124542
Step 188: 124542 + 666 = 125208
Step 189: 125208 + 666 = 125874
Step 190: 125874 + 666 = 126540
Step 191: 126540 + 666 = 127206
Step 192: 127206 + 666 = 127872
Step 193: 127872 + 666 = 128538
Step 194: 128538 + 666 = 129204
Step 195: 129204 + 666 = 129870
Step 196: 129870 + 666 = 130536
Step 197: 130536 + 666 = 131202
Step 198: 131202 + 666 = 131868
Step 199: 131868 + 666 = 132534
Step 200: 132534 + 666 = 133200
Step 201: 133200 + 666 = 133866
Step 202: 133866 + 666 = 134532
Step 203: 134532 + 666 = 135198
Step 204: 135198 + 666 = 135864
Step 205: 135864 + 666 = 136530
Step 206: 136530 + 666 = 137196
Step 207: 137196 + 666 = 137862
Step 208: 137862 + 666 = 138528
Step 209: 138528 + 666 = 139194
Step 210: 139194 + 666 = 139860
Step 211: 139860 + 666 = 140526
Step 212: 140526 + 666 = 141192
Step 213: 141192 + 666 = 141858
Step 214: 141858 + 666 = 142524
Step 215: 142524 + 666 = 143190
Step 216: 143190 + 666 = 143856
Step 217: 143856 + 666 = 144522
Step 218: 144522 + 666 = 145188
Step 219: 145188 + 666 = 145854
Step 220: 145854 + 666 = 146520
Step 221: 146520 + 666 = 147186
Step 222: 147186 + 666 = 147852
Step 223: 147852 + 666 = 148518
Step 224: 148518 + 666 = 149184
Step 225: 149184 + 666 = 149850
Step 226: 149850 + 666 = 150516
Step 227: 150516 + 666 = 151182
Step 228: 151182 + 666 = 151848
Step 229: 151848 + 666 = 152514
Step 230: 152514 + 666 = 153180
Step 231: 153180 + 666 = 153846
Step 232: 153846 + 666 = 154512
Step 233: 154512 + 666 = 155178
Step 234: 155178 + 666 = 155844
Step 235: 155844 + 666 = 156510
Step 236: 156510 + 666 = 157176
Step 237: 157176 + 666 = 157842
Step 238: 157842 + 666 = 158508
Step 239: 158508 + 666 = 159174
Step 240: 159174 + 666 = 159840
Step 241: 159840 + 666 = 160506
Step 242: 160506 + 666 = 161172
Step 243: 161172 + 666 = 161838
Step 244: 161838 + 666 = 162504
Step 245: 162504 + 666 = 163170
Step 246: 163170 + 666 = 163836
Step 247: 163836 + 666 = 164502
Step 248: 164502 + 666 = 165168
Step 249: 165168 + 666 = 165834
Step 250: 165834 + 666 = 166500
Step 251: 166500 + 666 = 167166
Step 252: 167166 + 666 = 167832
Step 253: 167832 + 666 = 168498
Step 254: 168498 + 666 = 169164
Step 255: 169164 + 666 = 169830
Step 256: 169830 + 666 = 170496
Step 257: 170496 + 666 = 171162
Step 258: 171162 + 666 = 171828
Step 259: 171828 + 666 = 172494
Step 260: 172494 + 666 = 173160
Step 261: 173160 + 666 = 173826
Step 262: 173826 + 666 = 174492
Step 263: 174492 + 666 = 175158
Step 264: 175158 + 666 = 175824
Step 265: 175824 + 666 = 176490
Step 266: 176490 + 666 = 177156
Step 267: 177156 + 666 = 177822
Step 268: 177822 + 666 = 178488
Step 269: 178488 + 666 = 179154
Step 270: 179154 + 666 = 179820
Step 271: 179820 + 666 = 180486
Step 272: 180486 + 666 = 181152
Step 273: 181152 + 666 = 181818
Step 274: 181818 + 666 = 182484
Step 275: 182484 + 666 = 183150
Step 276: 183150 + 666 = 183816
Step 277: 183816 + 666 = 184482
Step 278: 184482 + 666 = 185148
Step 279: 185148 + 666 = 185814
Step 280: 185814 + 666 = 186480
Step 281: 186480 + 666 = 187146
Step 282: 187146 + 666 = 187812
Step 283: 187812 + 666 = 188478
Step 284: 188478 + 666 = 189144
Step 285: 189144 + 666 = 189810
Step 286: 189810 + 666 = 190476
Step 287: 190476 + 666 = 191142
Step 288: 191142 + 666 = 191808

So, 666*288 = 191808