A construction team can install 840 meters of gas pipelines in 6 days. Now Heshan Country Garden needs to install a 2,520-meter-long gas pipeline. How many days will it take for the construction team to complete the installation? (column ratio calculation)
一个施工队6天可以安装煤气管道840米．现鹤山碧桂园需要安装2520米长的煤气管道，这个施工队多少天可以全部安装完毕？(列比例式计算)
<gadget id="calculator">2_520 * 6</gadget>
<output>15_120</output>

<gadget id="calculator">15_120 / 840</gadget>
<output>18</output>

<result>18</result>