To build a road with a total length of 12km, 0.5km is repaired on average every day for 3 days, how many kilometers have been repaired?
要修一条总长12km的公路，开工3天平均每天修0.5km，修了多少千米？
<gadget id="calculator">0.5 * 3</gadget>
<output>1.5</output>

<result>1.5</result>