The school bought 20 volleyballs, and bought more footballs than volleyballs (1/4). How many more footballs have you bought than volleyballs?
学校买来20个排球，买来的足球比排球多(1/4)．买来的足球比排球多几个？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (1/4)</gadget>
<output>5</output>

<result>5</result>