The road construction team builds a road, plans to build 105 meters per day, and completes it in 450 days. If it is to be completed 30 days in advance, how many meters will be repaired each day?
修路队修一条公路，计划每天修105米，450天完成．如果要提前30天完成，那么实际每天要多修多少米？
<gadget id="calculator">450 - 30</gadget>
<output>420</output>

<gadget id="calculator">450 / 420</gadget>
<output>15/14 = around 1.071429</output>

<gadget id="calculator">105 * (15/14)</gadget>
<output>225/2 = around 112.5</output>

<gadget id="calculator">(225/2) - 105</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>