31 乘法 90 等于多少？

31 × 89 = 2759 31 × 91 = 2821 31 × 92 = 2852 31 × 88 = 2728 31 × 93 = 2883 31 × 87 = 2697 31 × 94 = 2914 31 × 86 = 2666 30 × 90 = 2700 32 × 90 = 2880 29 × 90 = 2610 33 × 90 = 2970 28 × 90 = 2520 34 × 90 = 3060 35 × 90 = 3150 27 × 90 = 2430 30 × 93 = 2790 45 × 62 = 2790 62 × 45 = 2790 90 × 31 = 2790 93 × 30 = 2790 47 × 63 = 2961 85 × 73 = 6205 68 × 86 = 5848 4 × 52 = 208 43 × 30 = 1290 10 × 13 = 130 38 × 36 = 1368 15 × 51 = 765 32 × 45 = 1440