There are two granaries. Originally, warehouse A stored 1.5 tons more grain than warehouse B. After transporting 9.9 tons from warehouse A, the grain stored in warehouse A now belonged to warehouse B (4/5). Ask how many tons of grain was originally stored in warehouse B?
有两个粮仓，原来甲仓存粮比乙仓多1.5t，从甲仓运走9.9t后，这时甲仓存粮是乙仓的(4/5)．求乙仓原来存粮多少吨？
<gadget id="calculator">9.9 - 1.5</gadget>
<output>8.4</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">8.4 / (1/5)</gadget>
<output>42</output>

<result>42</result>