8 乘法 81 等于多少？

8 × 80 = 640 8 × 82 = 656 8 × 83 = 664 8 × 79 = 632 8 × 84 = 672 8 × 78 = 624 8 × 85 = 680 8 × 77 = 616 7 × 81 = 567 9 × 81 = 729 6 × 81 = 486 10 × 81 = 810 11 × 81 = 891 5 × 81 = 405 12 × 81 = 972 4 × 81 = 324 9 × 72 = 648 12 × 54 = 648 18 × 36 = 648 24 × 27 = 648 27 × 24 = 648 36 × 18 = 648 44 × 61 = 2684 9 × 91 = 819 76 × 79 = 6004 43 × 33 = 1419 52 × 52 = 2704 6 × 35 = 210 88 × 27 = 2376 5 × 28 = 140