A rope is 30 meters, 10 meters are used for the first time, 1/4 of the total length is used for the second time, and what fraction of the total length is used for the second time?
一根绳30米，第一次用去10米，第二次用去全长的(1/4)，二次一共用去全长的几分之几？
<gadget id="calculator">10 / 30</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) + (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>