Fold a paper airplane with (1/4) pieces of colored paper, Huang Fang folded 60 paper airplanes, how many pieces of colored paper were used.
折一个纸飞机用(1/4)张彩纸，黄芳折了60个纸飞机，共用了多少张彩纸．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">60 * (1/4)</gadget>
<output>15</output>

<result>15</result>