For a piece of pie, the younger brother ate (3/8) and the older brother ate (5/8), how much did they eat together? What fraction is left?
一块饼，弟弟吃了它的(3/8)，哥哥吃了它的(5/8)，两人一共吃了几分之几？还剩下几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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

<result>1</result>