flour mill uses 250 kg of wheat to grind 200 kg of flour. What is the flour extraction rate of wheat.
面粉厂用250千克小麦，磨出了200千克面粉．小麦的出粉率是多少．
<gadget id="calculator">200 / 250</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>