There are 300 tons of grain stored in two warehouses, A and B. The 20 tons of stored grain in warehouse B is exactly 60% of that in warehouse A. How many tons of grain is stored in warehouse A?
甲乙两仓共存粮300吨．乙仓存粮调进20吨后恰好是甲仓的60%，甲仓存粮多少吨？
<gadget id="calculator">300 + 20</gadget>
<output>320</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">320 / (8/5)</gadget>
<output>200</output>

<result>200</result>