出售金鱼问题：第一次卖出全部金鱼的一半加二分之一条金鱼；第二次卖出乘余金鱼的三分之一加三分之一条金鱼；第三次卖出剩余金鱼的四分之一加四分之一条金鱼；第四次卖出剩余金鱼的五分之一加五分之一条金鱼；现在还剩下11条金鱼，在出售金鱼时不能把金鱼切开或者有任何破损的。问这鱼缸里原有多少条金鱼？-Sell ​ ​ goldfish: the first time to sell half plus half of the goldfish, a goldfish　sell goldfish by more than one-third plus one-third of goldfish in the second　sold for the third quarter plus the remaining goldfish quarter goldfish　the fourth time to sell the remaining goldfish fifth fifths of a goldfish　remaining 11 goldfish, the sale of goldfish, goldfish can not be cut or there is any damage. Asked the original number of goldfish in the aquarium?