The oil yield of rapeseed is 30%, how many tons of rapeseed oil can be produced by frying 30 tons of rapeseed.
菜籽的出油率是30%，30吨菜籽可以炸出多少吨菜籽油．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">30 * (3/10)</gadget>
<output>9</output>

<result>9</result>