21 乘法 28 等于多少？

21 × 29 = 609 21 × 27 = 567 21 × 30 = 630 21 × 26 = 546 21 × 31 = 651 21 × 25 = 525 21 × 32 = 672 21 × 24 = 504 20 × 28 = 560 22 × 28 = 616 19 × 28 = 532 23 × 28 = 644 24 × 28 = 672 18 × 28 = 504 25 × 28 = 700 17 × 28 = 476 6 × 98 = 588 7 × 84 = 588 12 × 49 = 588 14 × 42 = 588 28 × 21 = 588 42 × 14 = 588 86 × 100 = 8600 33 × 100 = 3300 57 × 8 = 456 24 × 94 = 2256 63 × 84 = 5292 78 × 80 = 6240 75 × 84 = 6300 27 × 63 = 1701