Meimei yelled at the top of the opposite mountain from the top of the mountain, and he heard the echo from the other side about 5 seconds later. It is known that the speed of sound in the air is about 340 meters per second. What is the approximate distance between the tops of these two mountains?
美美在山顶对着对面的山顶大吼一声，大约5秒钟后他听到了对面的回声．已知声音在空气中的传播速度大约是每秒340米，这两座山的山顶之间大约相距多少米？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">340 * (5/2)</gadget>
<output>850</output>

<result>850</result>