Mom divided the mooncake into 8 pieces on average, Xiaoli ate 1 piece, and Dad ate 2 pieces. What fraction of the mooncake is left?
妈妈把一个月饼平均分成8块，小丽吃了1块，爸爸吃了2块，这个月饼还剩下几分之几？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

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

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