The flour extraction rate of wheat is 85%, how many kilograms of flour can be produced by grinding 300 kilograms of wheat.
小麦的出粉率为85%，300千克小麦能磨出多少千克面粉．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">300 * (17/20)</gadget>
<output>255</output>

<result>255</result>