A construction team excavated a tunnel, excavated 30 meters in the first month, and excavated 24 meters in the second month, and completed the task in two months (3/10). How long is the tunnel in meters?
一个施工队开凿一条隧道，第一个月开凿了30米，第二个月开凿了24米，两个月完成了任务的(3/10)．这条隧道的长是多少米？
<gadget id="calculator">30 + 24</gadget>
<output>54</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">54 / (3/10)</gadget>
<output>180</output>

<result>180</result>