80 乘法 81 等于多少？

80 × 80 = 6400 80 × 82 = 6560 80 × 83 = 6640 80 × 79 = 6320 80 × 84 = 6720 80 × 78 = 6240 80 × 85 = 6800 80 × 77 = 6160 79 × 81 = 6399 81 × 81 = 6561 78 × 81 = 6318 82 × 81 = 6642 83 × 81 = 6723 77 × 81 = 6237 84 × 81 = 6804 76 × 81 = 6156 72 × 90 = 6480 81 × 80 = 6480 90 × 72 = 6480 79 × 89 = 7031 44 × 34 = 1496 95 × 62 = 5890 55 × 32 = 1760 83 × 58 = 4814 38 × 1 = 38 16 × 84 = 1344 92 × 23 = 2116 36 × 49 = 1764 87 × 67 = 5829 29 × 56 = 1624