For a canal, the full length (3/8) was built on the first day, and the full length (1/4) was built on the second day. What is the total length of the two days?
一条水渠，第一天修了全长的(3/8)，第二天修了全长的(1/4)，两天一共全长的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">(3/8) + (1/4)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>