There are 16 watercolor pens in a box, take out (1/4) of this box of colored pens, how many pens did you take out?
一盒水彩笔有16支，拿出这盒彩笔的(1/4)，拿出了多少支．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">16 * (1/4)</gadget>
<output>4</output>

<result>4</result>