In order to investigate the traffic flow of a certain intersection in a certain period of time, the number of vehicles passing through the intersection in the same period of 15 days was recorded, among which there were 142 vehicles on 2 days, 145 vehicles on 2 days, 156 vehicles on 6 days, and 157 vehicles on 5 days car. So what is the average number of cars passing through the intersection during the 15 days
为了调查某一路口某一时段的汽车流量，记录了15天同一时段通过该路口的汽车辆数，其中有2天是142辆，2天是145辆，6天是156辆，5天是157辆．那么这15天在该时段通过该路口的汽车平均辆数是多少
<gadget id="calculator">142 * 2</gadget>
<output>284</output>

<gadget id="calculator">145 * 2</gadget>
<output>290</output>

<gadget id="calculator">156 * 6</gadget>
<output>936</output>

<gadget id="calculator">157 * 5</gadget>
<output>785</output>

<gadget id="calculator">284 + 290 + 936 + 785</gadget>
<output>2_295</output>

<gadget id="calculator">2_295 / 15</gadget>
<output>153</output>

<result>153</result>