There is a certain amount of grain in Warehouse A. After transporting 4.8 tons, the rest is 3.5 tons more than what was transported away. How many tons of grain was stored in Warehouse A?
甲仓有粮食若干，运出4.8吨后，剩下的比运走的多3.5吨，甲仓原来存有粮食多少吨？
<result>12.1</result>