Two engineering teams will open a 674-meter-long tunnel. The first engineering team excavated 22.6 meters per day. After working for 5 days, the second engineering team excavated from the other end, and the second engineering team excavated 14.8 meters per day. How many days will this tunnel take to get through?
两个工程队要开一条674米长的隧道．第一工程队每天开22.6米，工作5天后，第二工程队从另一端开凿，第二工程队每天开14.8米．这条隧道要用多少天才能打通？
<gadget id="calculator">22.6 * 5</gadget>
<output>113</output>

<gadget id="calculator">674 - 113</gadget>
<output>561</output>

<gadget id="calculator">22.6 + 14.8</gadget>
<output>37.4</output>

<gadget id="calculator">561 / 37.4</gadget>
<output>15</output>

<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<result>20</result>