21 乘法 84 等于多少？

21 × 83 = 1743 21 × 85 = 1785 21 × 82 = 1722 21 × 86 = 1806 21 × 87 = 1827 21 × 81 = 1701 21 × 88 = 1848 21 × 80 = 1680 20 × 84 = 1680 22 × 84 = 1848 19 × 84 = 1596 23 × 84 = 1932 24 × 84 = 2016 18 × 84 = 1512 25 × 84 = 2100 17 × 84 = 1428 18 × 98 = 1764 28 × 63 = 1764 36 × 49 = 1764 42 × 42 = 1764 49 × 36 = 1764 63 × 28 = 1764 80 × 79 = 6320 8 × 4 = 32 93 × 9 = 837 86 × 2 = 172 29 × 84 = 2436 42 × 32 = 1344 51 × 68 = 3468 31 × 77 = 2387