The school bought 60 boxes of white chalk, and the number of red chalks bought was white chalk (1/4) and colored chalk (3/5). How many boxes of colored chalks did the school buy?
学校买了60盒白粉笔，买的红粉笔数是白粉笔的(1/4)，又是彩色粉笔的(3/5)，学校买了多少盒彩色粉笔？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/4) / (3/5)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">60 * (5/12)</gadget>
<output>25</output>

<result>25</result>