road construction team originally planned to complete a road in 20 days. Actually, 45 meters more than the original plan was repaired every day, and the task was completed 5 days ahead of schedule. How many meters was originally planned to build roads per day? (Answer with proportional knowledge)
一个修路队原计划20天修完一条公路．实际每天比原计划多修45米，提前5天完成任务．原计划每天修路多少米？(用比例知识解答)
<gadget id="calculator">45 * 20</gadget>
<output>900</output>

<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<gadget id="calculator">900 - 225</gadget>
<output>675</output>

<gadget id="calculator">675 / 5</gadget>
<output>135</output>

<result>135</result>