The flour extraction rate of wheat is 65%, how many kilograms of wheat are needed to extract 195 kg of flour.
小麦的出粉率是65%，要出粉195千克需要小麦多少千克．
<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">195 / (13/20)</gadget>
<output>300</output>

<result>300</result>