Build a staff dormitory. It is planned to use 240 6-meter-long water pipes. Later, 8-meter-long water pipes were used. How many pipes are needed in total? (Answer with proportional knowledge)
盖一幢职工宿舍．计划使用6米长的水管240根．后来改用8米长的水管，共需要多少根？(用比例知识解答)
<gadget id="calculator">6 * 240</gadget>
<output>1_440</output>

<gadget id="calculator">1_440 / 8</gadget>
<output>180</output>

<result>180</result>