81 乘法 9 等于多少？

81 × 8 = 648 81 × 10 = 810 81 × 11 = 891 81 × 7 = 567 81 × 12 = 972 81 × 6 = 486 81 × 13 = 1053 81 × 5 = 405 80 × 9 = 720 82 × 9 = 738 83 × 9 = 747 79 × 9 = 711 84 × 9 = 756 78 × 9 = 702 85 × 9 = 765 77 × 9 = 693 9 × 81 = 729 27 × 27 = 729 38 × 36 = 1368 25 × 40 = 1000 91 × 74 = 6734 1 × 36 = 36 20 × 91 = 1820 98 × 33 = 3234 44 × 2 = 88 84 × 88 = 7392 18 × 49 = 882 72 × 97 = 6984 16 × 46 = 736 5 × 10 = 50