There are two warehouses, A and B, and A warehouse stores 30 tons of grain. If (1/10) is taken out from A warehouse and put into B warehouse, the amount of grain stored in the two warehouses is equal. How many tons of grain are stored in the two warehouses?
甲乙两个仓库，甲仓存粮30吨，如果从甲仓中取出(1/10)放入乙仓，则两仓存粮数相等．两仓一共存粮多少吨？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">30 * (9/10) * 2</gadget>
<output>54</output>

<result>54</result>