Team A and Team B work together to dig a tunnel. Team A completes 50 meters per day, and Team B completes 75 meters per day. Teams A and B dig from opposite ends of the tunnel. The total length of the tunnel is 1.875 kilometers. How many days can they dig through?
甲乙两队合作挖一条隧道，甲队每天完成50米，乙队每天完成75米，甲乙两队从隧道两头相对挖路，隧道总长1.875千米长，他们几天能挖通？
<gadget id="calculator">1.875 * 1_000</gadget>
<output>1_875</output>

<gadget id="calculator">50 + 75</gadget>
<output>125</output>

<gadget id="calculator">1_875 / 125</gadget>
<output>15</output>

<result>15</result>