Divide a cake into 8 pieces on average, Xiao Pang ate 2 pieces, Xiao Qiao ate 1 piece, how many cakes are left?
把一个蛋糕平均分成了8块，小胖吃了2块，小巧吃了1块，还剩下多少蛋糕？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

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

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

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