There are two warehouses, A and B. It is known that warehouse A stores 300 tons of grain. If it takes out (3/10) from warehouse A and puts it into warehouse B, the two warehouses have the same amount of grain. How many tons of grain is stored in warehouse A than in warehouse B?
甲、乙两个仓库，已知甲仓库存粮食300吨，如果从甲仓库取出(3/10)放入乙仓库，两个仓库存粮相等，原来甲仓库比乙仓库多多少吨存粮？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10) - (3/10)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">300 * (3/5)</gadget>
<output>180</output>

<result>180</result>