A residential area is building an informatization community. A total of 720 households need to install broadband equipment. After 12 days of work by the engineering team, (2/5) have completed the installation work. How many households are left to install?
某居民小区建设信息化小区，共有720户家庭要安装宽带设备，工程队工作12天后，已经完成了安装工作的(2/5)，还剩多少户居民需要安装？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">720 * (3/5)</gadget>
<output>432</output>

<result>432</result>