The oil yield of peanuts is 42%, how many kilograms of oil can be extracted from 500 kilograms of peanuts.
花生出油率是42%，500千克的花生可榨油多少千克．
<gadget id="calculator">42 / 100</gadget>
<output>21/50 = around 0.42</output>

<gadget id="calculator">500 * (21/50)</gadget>
<output>210</output>

<result>210</result>