A piece of cake is cut into 8 pieces on average, mom eats 3 pieces, Xiaoming eats 2 pieces, father eats 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2块，爸爸吃了1块，还剩下这块饼的((())/(()))．
<gadget id="calculator">8 - 3 - 2 - 1</gadget>
<output>2</output>

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

<result>1/4 = around 0.25</result>