For any two numbers P and Q, stipulate P☆Q=(P*Q)/4, for example: 2☆8=(2*8)/4, given that x☆(8☆5)=10, find the value of x.
对于任意的两个数P、Q，规定P☆Q=(P*Q)/4，例如：2☆8=(2*8)/4，已知x☆(8☆5)=10，求x的值．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">8 * (5/4)</gadget>
<output>10</output>

<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">10 / (5/2)</gadget>
<output>4</output>

<result>4</result>