The oil yield of a certain kind of peanut is 25%, and it is necessary to squeeze out 100 kg of peanut oil. How many kilograms of peanuts are needed?
某种花生出油率为25%，要想榨出100千克花生油．需要多少千克花生？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">100 / (1/4)</gadget>
<output>400</output>

<result>400</result>