There are four grain warehouses. There are 480 tons of grain stored in warehouses A and B. It is known that the grain in warehouse C is (3/4) that of warehouse A, and the tonnage of grain in warehouse D is that of warehouse B (3/4). , How many tons of grain do these four warehouses have in total?
有四个粮食仓库，甲、乙两个仓库共存粮食480吨，已知丙仓库的粮食是甲仓库的(3/4)，丁仓库里粮食的吨数是乙仓库粮食的(3/4)，这四个仓库共有粮食多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">480 * (3/4)</gadget>
<output>360</output>

<gadget id="calculator">480 + 360</gadget>
<output>840</output>

<result>840</result>