Calculate with a simple method: (1/8)*125*8*(1/25).
用简便方法计算：(1/8)*125*8*(1/25)．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/8) * 125 * 8 * (1/25)</gadget>
<output>5</output>

<result>5</result>