Xiao Ming has to do 150 cross-point math problems, and do it (1/3) every day, how many days to finish it.
小明要做150道口算题，每天做它的(1/3)，多少天做完．
<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>