The weight of 3 apples + the weight of 1 pineapple = the weight of 14 oranges; the weight of 6 oranges + the weight of 1 apple = the weight of 1 pineapple; the weight of 1 pineapple = the weight of how many oranges.
3个苹果的重量+1个菠萝的重量=14个桔子的重量；6个桔子的重量+1个苹果的重量=1个菠萝的重量；1个菠萝的重量=多少个桔子的重量．
<result>8</result>