The oil yield of a certain peanut kernel is about 42%. How many kilograms of peanut kernels are needed to extract 1050 kilograms of oil.
某种花生仁的出油率约是42%，要榨1050千克油，需要多少千克花生仁．
<gadget id="calculator">42 / 100</gadget>
<output>21/50 = around 0.42</output>

<gadget id="calculator">1_050 / (21/50)</gadget>
<output>2_500</output>

<result>2_500</result>