The telecommunications bureau installed telephones for 710 households in Jinghua Community, 556 households were installed in 7 days, and the remaining 2 days were completed. How many households were installed on average per day?
电信局给景华小区710户居民安装电话，7天安装了556户，余下的2天完成，余下的平均每天安装多少户？
<gadget id="calculator">710 - 556</gadget>
<output>154</output>

<gadget id="calculator">154 / 2</gadget>
<output>77</output>

<result>77</result>