To pave a section of railway, team A paves 5.4 meters every day, team B paves 4.6 meters every day, and the two teams jointly complete the paving in 18 days. How long is this railway?
铺一段铁路，甲队每天铺5.4米，乙队每天铺4.6米，两队合铺18天完成．这段铁路长多少米？
<gadget id="calculator">5.4 + 4.6</gadget>
<output>10</output>

<gadget id="calculator">10 * 18</gadget>
<output>180</output>

<result>180</result>