A piece of cake is cut into 8 pieces on average, mother ate 3 pieces, Xiaoming ate 1 piece, and there is still ((())/(())) of this piece of cake.
一块饼平均切成8块，妈妈吃了3块，小明吃了1块，还剩下这块饼的((())/(()))．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (3/8) - (1/8)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>