18 乘法 21 等于多少？

18 × 20 = 360 18 × 22 = 396 18 × 19 = 342 18 × 23 = 414 18 × 24 = 432 18 × 18 = 324 18 × 25 = 450 18 × 17 = 306 17 × 21 = 357 19 × 21 = 399 20 × 21 = 420 16 × 21 = 336 21 × 21 = 441 15 × 21 = 315 22 × 21 = 462 14 × 21 = 294 6 × 63 = 378 7 × 54 = 378 9 × 42 = 378 14 × 27 = 378 21 × 18 = 378 27 × 14 = 378 29 × 49 = 1421 85 × 95 = 8075 36 × 58 = 2088 19 × 98 = 1862 59 × 18 = 1062 52 × 30 = 1560 52 × 15 = 780 59 × 49 = 2891