To build a road, it is planned to build 150 meters per day, and it will be completed in 15 days. As a result, the time is shortened by 20%. How many meters are actually repaired per day? (Solve with ratio)
修筑一条公路，计划每天修150米，15天修完，结果时间缩短20%，实际每天修多少米？(用比例解)
<gadget id="calculator">150 * 15</gadget>
<output>2_250</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">15 * (1/5)</gadget>
<output>3</output>

<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">2_250 / 12</gadget>
<output>375/2 = around 187.5</output>

<result>375/2 = around 187.5</result>