A road is 270 meters long. It was originally planned to be completed in 15 days, but it took 6 days less. How many meters more roads were built each day than originally planned?
一条路长270米，原计划15天修完，实际少用6天，实际每天比原计划多修路多少米？
<gadget id="calculator">15 - 6</gadget>
<output>9</output>

<gadget id="calculator">270 / 9</gadget>
<output>30</output>

<gadget id="calculator">270 / 15</gadget>
<output>18</output>

<gadget id="calculator">30 - 18</gadget>
<output>12</output>

<result>12</result>