One ton of rapeseed can extract (7/100) tons of oil, how many tons of rapeseed are needed to squeeze 35 tons of oil.
每吨菜籽可以榨油(7/100)吨，榨35吨油需菜籽多少吨．
<gadget id="calculator">7 / 100</gadget>
<output>7/100 = around 0.07</output>

<gadget id="calculator">35 / (7/100)</gadget>
<output>500</output>

<result>500</result>