The speed of Mercury is 48 kilometers per second. At this speed, it can circle the earth in 15 minutes. How many kilometers is it to orbit the earth?
水星运行的速度是每秒48千米，以这样的速度，用15分钟就能绕地球一周，绕地球一周是多少千米？
<gadget id="calculator">48 * 900</gadget>
<output>43_200</output>

<result>43_200</result>