A silk rope, its (3/8) was used up for the first time, and its (2/8) was used up for the second time, what fraction of it was used up twice?
一根丝绳，第一次用去了它的(3/8)，第二次用去了它的(2/8)，两次共用去了它的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 8</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>