The school bought an 18-meter-long plastic rope. After cutting 9 skipping ropes of the same length, there were 2.7 meters left. How long is each skipping rope on average?
学校买来一根18米长塑料绳，剪下9根同样长的跳绳后，还剩下2.7米，平均每根跳绳长多少米？
<gadget id="calculator">18 - 2.7</gadget>
<output>15.3</output>

<gadget id="calculator">15.3 / 9</gadget>
<output>1.7</output>

<result>1.7</result>