Warehouse A stores more grain than Warehouse B (2/3), and Warehouse B has 6 tons less than Warehouse A. How many tons of grain is stored in Warehouse B?
甲仓比乙仓的存粮多(2/3)，乙仓比甲仓少6吨，乙仓存粮多少吨．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 / (2/3)</gadget>
<output>9</output>

<result>9</result>