Workers repair a road. If they repair 12 meters a day and finish it in 10 days, they will actually build an extra 3 meters a day. How many days can it actually be completed?
工人们修一条公路，如果每天修12米，10天修完，实际每天多修3米，实际多少天可以修完？
<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<gadget id="calculator">10 / 15</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 * (2/3)</gadget>
<output>8</output>

<result>8</result>