Xiaoxiao has to walk 30 minutes from home to school, and he walked for 12 minutes, how much is the whole journey.
笑笑从家到学校要走30分钟，他走了12分钟，还要走全程的多少．
<gadget id="calculator">12 / 30</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>