A flour mill can grind 13000 kg of flour with 20 tons of wheat. Seeking the flour extraction rate of wheat?
一个面粉厂，用20吨小麦能磨出13000千克的面粉．求小麦的出粉率？
<gadget id="calculator">20 * 1_000</gadget>
<output>20_000</output>

<gadget id="calculator">13_000 / 20_000</gadget>
<output>13/20 = around 0.65</output>

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

<gadget id="calculator">(13/20) * 1</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>