68 乘法 21 等于多少？

68 × 20 = 1360 68 × 22 = 1496 68 × 19 = 1292 68 × 23 = 1564 68 × 24 = 1632 68 × 18 = 1224 68 × 25 = 1700 68 × 17 = 1156 67 × 21 = 1407 69 × 21 = 1449 66 × 21 = 1386 70 × 21 = 1470 65 × 21 = 1365 71 × 21 = 1491 64 × 21 = 1344 72 × 21 = 1512 17 × 84 = 1428 21 × 68 = 1428 28 × 51 = 1428 34 × 42 = 1428 42 × 34 = 1428 51 × 28 = 1428 71 × 89 = 6319 8 × 26 = 208 67 × 78 = 5226 53 × 81 = 4293 77 × 1 = 77 73 × 38 = 2774 54 × 72 = 3888 38 × 60 = 2280