Mom divides a piece of birthday cake into 8 parts on average, Xiaohua eats 5 parts, how much of this cake is left.
妈妈把一块生日蛋糕平均分成8份，小华吃了5份，还剩这块蛋糕的多少．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

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

<result>3/8 = around 0.375</result>