The hunting dog found a running rabbit 10 meters ahead, and immediately chased it. It is known that the distance of 9 steps of the rabbit is equivalent to 5 steps of the hunting dog; the rabbit can run 3 steps in the time that the hunting dog runs 5 steps. How many meters did the hound run when it caught up with the rabbit?
猎狗发现前方10米处有一只奔跑着的兔子，马上去追．已知兔子9步的距离相当于猎狗的5步；猎狗跑5步的时间兔子能跑3步．问猎狗追上兔子时，共跑了多少米？
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>