The oil yield of rapeseed is 42%. How many kilograms of rapeseed are needed to extract 1050 kg of oil?
菜籽的出油率是42%，要榨油1050千克，需要油菜籽多少千克？
<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>