A． The distance between B and B is 900 kilometers. It takes A car to travel from A to B in 15 hours, and B takes 10 hours to travel from B to A. Two cars start from two places at the same time, how many kilometers is car A away from place B when they meet?
A．B两地相距900千米，甲车从A到B需要15小时，乙车从B到A需要10小时．两车同时从两地出发，相遇时甲车距B地还有多少千米？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">900 * (3/5)</gadget>
<output>540</output>

<result>540</result>