4 乘法 21 等于多少？

4 × 20 = 80 4 × 22 = 88 4 × 19 = 76 4 × 23 = 92 4 × 24 = 96 4 × 18 = 72 4 × 25 = 100 4 × 17 = 68 3 × 21 = 63 5 × 21 = 105 2 × 21 = 42 6 × 21 = 126 1 × 21 = 21 7 × 21 = 147 8 × 21 = 168 9 × 21 = 189 1 × 84 = 84 2 × 42 = 84 3 × 28 = 84 6 × 14 = 84 7 × 12 = 84 12 × 7 = 84 25 × 64 = 1600 13 × 28 = 364 52 × 46 = 2392 83 × 97 = 8051 71 × 49 = 3479 86 × 60 = 5160 66 + 18 = 84 5 + 79 = 84