One road, originally planned to build 20 meters per day, can be completed in 12 days. Actually repair 4 meters more every day, how many days can the repair be completed?
一条路，原计划每天修20米，12天可以修完．实际每天多修4米，实际多少天可以修完？
<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<gadget id="calculator">12 / 24</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 * (1/2)</gadget>
<output>10</output>

<result>10</result>