The fourth-grade students have already walked 20 minutes from school to the museum to visit the geological exhibition. They have traveled 840 meters. At this speed, it will take 30 minutes to get there. How many meters are there from the school to the museum?
四年级学生从学校到博物馆参观地质展览，已经走20分钟，行了840米，照这样速度，还要30分钟才能到达，从学校到博物馆共有多少米？
<gadget id="calculator">840 / 20</gadget>
<output>42</output>

<gadget id="calculator">42 * 30</gadget>
<output>1_260</output>

<gadget id="calculator">840 + 1_260</gadget>
<output>2_100</output>

<result>2_100</result>