The oil yield of rapeseed is 42%, how many kilograms of oil can be extracted from 8400kg rapeseed.
油菜籽的出油率是42%，8400kg油菜籽可以榨油多少千克．
<gadget id="calculator">42 / 100</gadget>
<output>21/50 = around 0.42</output>

<gadget id="calculator">8_400 * (21/50)</gadget>
<output>3_528</output>

<result>3_528</result>