80 乘法 21 等于多少？

80 × 20 = 1600 80 × 22 = 1760 80 × 19 = 1520 80 × 23 = 1840 80 × 24 = 1920 80 × 18 = 1440 80 × 25 = 2000 80 × 17 = 1360 79 × 21 = 1659 81 × 21 = 1701 78 × 21 = 1638 82 × 21 = 1722 83 × 21 = 1743 77 × 21 = 1617 84 × 21 = 1764 76 × 21 = 1596 20 × 84 = 1680 21 × 80 = 1680 24 × 70 = 1680 28 × 60 = 1680 30 × 56 = 1680 35 × 48 = 1680 91 × 80 = 7280 13 × 95 = 1235 29 × 48 = 1392 1 × 21 = 21 37 × 87 = 3219 84 × 12 = 1008 89 × 29 = 2581 90 × 31 = 2790