Light rain and heavy snow walked toward each other from both ends of the bridge, and after 30 minutes they were still 45 meters apart. Light rain walks 65 meters per minute, heavy snow walks 80 meters per minute, what is the length of the bridge in meters?
小雨和大雪分别从桥的两端相向而行，30分钟后两人还相距45米．小雨每分钟步行65米，大雪每分钟步行80米，桥的长度是多少米？
<gadget id="calculator">65 + 80</gadget>
<output>145</output>

<gadget id="calculator">145 * 30</gadget>
<output>4_350</output>

<gadget id="calculator">4_350 + 45</gadget>
<output>4_395</output>

<result>4_395</result>