Class 5 and Class 1 went to the field to collect specimens. The whole class collected 136 specimens in the morning, 172 less than twice the number collected in the afternoon. How many specimens were collected in the afternoon?
五1班同学去野外采集标本，上午全班共采集标本136件，比下午采集标本的2倍少172件，下午采集标本多少件？
<gadget id="calculator">136 + 172</gadget>
<output>308</output>

<gadget id="calculator">308 / 2</gadget>
<output>154</output>

<result>154</result>