The cafeteria bought 450 kilograms of rice, and the flour it bought was 20% less than the rice. How many kilograms of flour did it buy?
食堂买来450千克大米，买来的面粉比大米少20%，买来面粉多少千克？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">450 * (4/5)</gadget>
<output>360</output>

<result>360</result>