The flour extraction rate of wheat is 85%, how many kilograms of flour can be ground from 200 kilograms of wheat.
小麦的出粉率为85%，200千克小麦能磨出面粉多少千克．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">200 * (17/20)</gadget>
<output>170</output>

<result>170</result>