A road is 80 meters long, and 30 meters have been repaired, what fraction is left to be repaired?
一条路长80米，修完了30米，还剩几分之几没修？
<gadget id="calculator">80 - 30</gadget>
<output>50</output>

<gadget id="calculator">50 / 80</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>