7 乘法 80 等于多少？

7 × 79 = 553 7 × 81 = 567 7 × 78 = 546 7 × 82 = 574 7 × 83 = 581 7 × 77 = 539 7 × 84 = 588 7 × 76 = 532 6 × 80 = 480 8 × 80 = 640 5 × 80 = 400 9 × 80 = 720 4 × 80 = 320 10 × 80 = 800 11 × 80 = 880 3 × 80 = 240 8 × 70 = 560 10 × 56 = 560 14 × 40 = 560 16 × 35 = 560 20 × 28 = 560 28 × 20 = 560 34 × 13 = 442 99 × 98 = 9702 15 × 99 = 1485 42 × 24 = 1008 33 × 96 = 3168 88 × 81 = 7128 79 × 41 = 3239 75 × 41 = 3075