A cake, Linlin ate it (2/8), mother ate more of this cake than Linlin (3/8), how much of this cake is left?
一个蛋糕，林林吃了它的(2/8)，妈妈比林林多吃了这个蛋糕的(3/8)，还剩这个蛋糕的几分之几？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">1 - (5/8) - (1/4)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>