81 乘法 21 等于多少？

81 × 20 = 1620 81 × 22 = 1782 81 × 19 = 1539 81 × 23 = 1863 81 × 24 = 1944 81 × 18 = 1458 81 × 25 = 2025 81 × 17 = 1377 80 × 21 = 1680 82 × 21 = 1722 83 × 21 = 1743 79 × 21 = 1659 84 × 21 = 1764 78 × 21 = 1638 85 × 21 = 1785 77 × 21 = 1617 21 × 81 = 1701 27 × 63 = 1701 63 × 27 = 1701 29 × 8 = 232 32 × 42 = 1344 42 × 93 = 3906 69 × 69 = 4761 26 × 39 = 1014 99 × 67 = 6633 75 × 6 = 450 90 × 29 = 2610 92 × 99 = 9108 15 × 89 = 1335 2 × 67 = 134