A bottle of oil is 3 kilograms, if you use (1/3) every day, how many days can you use it up.
一瓶油3千克，如果每天用(1/3)，多少天可以用完．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / (1/3)</gadget>
<output>3</output>

<result>3</result>