The factory cafeteria bought 150 kilograms of flour, which was less than the rice (2/5). How many kilograms of rice did you buy? (Solve the equation.)
工厂食堂买来150千克面粉，比买的大米少(2/5)，买的大米有多少千克？(用方程解．)
<gadget id="calculator">2 / 5</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">150 / (3/5)</gadget>
<output>250</output>

<result>250</result>