The yield rate of paddy is 68%. If 340 kg of rice is needed, how many kg of paddy should be prepared.
稻谷的出米率为68%，若需米340千克，需准备稻谷多少千克．
<gadget id="calculator">68 / 100</gadget>
<output>17/25 = around 0.68</output>

<gadget id="calculator">340 / (17/25)</gadget>
<output>500</output>

<result>500</result>