In the days of "5.12" earthquake relief, Uncle Chen, the armed policeman, worked on the front line for 70 hours in the first 4 days, and worked on the front line for an average of 14 hours a day in the last 3 days. How many hours does Uncle Chen work on the front line on average this week?
在"5.12"抗震救灾的日子里，武警陈叔叔前4天在一线共奋战70小时，后3天平均每天在一线工作14小时．这一周陈叔叔平均每天在一线工作多少小时？
<gadget id="calculator">14 * 3</gadget>
<output>42</output>

<gadget id="calculator">42 + 70</gadget>
<output>112</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">112 / 7</gadget>
<output>16</output>

<result>16</result>