Two cars A and B start from A to B at the same time. It takes 10 hours for A and 15 hours for B to complete the journey. After 2 hours, what is the distance between the two cars?
甲、乙两车同时从A地向B地出发，行完全程甲车需要10小时，乙车需要15小时，2小时后，两车相距的距离是全程的几分之几？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) - (1/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) * 2</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>