21 乘法 18 等于多少？

21 × 17 = 357 21 × 19 = 399 21 × 20 = 420 21 × 16 = 336 21 × 21 = 441 21 × 15 = 315 21 × 22 = 462 21 × 14 = 294 20 × 18 = 360 22 × 18 = 396 19 × 18 = 342 23 × 18 = 414 24 × 18 = 432 18 × 18 = 324 25 × 18 = 450 17 × 18 = 306 6 × 63 = 378 7 × 54 = 378 9 × 42 = 378 14 × 27 = 378 18 × 21 = 378 27 × 14 = 378 50 × 96 = 4800 18 × 97 = 1746 32 × 31 = 992 27 × 30 = 810 2 × 34 = 68 51 × 86 = 4386 23 × 16 = 368 71 × 71 = 5041