team installed 480 meters of water pipes, and installed 120 meters in the first 4 days. According to this calculation, how many days will it take to install the water pipes?
某队安装480米的水管，前4天装了120米，照这样计算，安装完这水管还要多少天？
<gadget id="calculator">480 - 120</gadget>
<output>360</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<gadget id="calculator">360 / 30</gadget>
<output>12</output>

<result>12</result>