25 kg of wheat flour is 22.5 kg, what is the flour extraction rate?
25千克小麦磨面粉22.5千克，出粉率多少．
<gadget id="calculator">22.5 / 25</gadget>
<output>0.9</output>

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

<gadget id="calculator">0.9 * 1</gadget>
<output>0.9</output>

<result>0.9</result>