To build a section of road, the original plan was to build 1.25 kilometers per day, and it would take 30 days to complete the repair. Actually repair 0.25 kilometers more every day, how many days earlier than planned?
修一段公路，原计划每天修1.25千米，30天修完．实际每天多修0.25千米，实际比计划提前几天修完？
<gadget id="calculator">1.25 + 0.25</gadget>
<output>1.5</output>

<gadget id="calculator">30 / 1.5</gadget>
<output>20</output>

<gadget id="calculator">1.25 * 20</gadget>
<output>25</output>

<gadget id="calculator">30 - 25</gadget>
<output>5</output>

<result>5</result>