The hound finds a running rabbit 10 meters away from it, and immediately chases after it. The hound has big strides. It runs two steps, and the rabbit needs to run three steps; but the rabbit moves fast, and the hound runs three steps. A rabbit can run 4 steps. Question: How many meters must the hound run to catch up with the rabbit?
猎犬发现离它10米远的前方有一只奔跑着的兔子，立即追赶，猎犬的步子大，它跑2步的路程，兔子要跑3步；但是兔子的动作快，猎犬跑3步的时间，兔子能跑4步．问：猎犬至少要跑多少米才能追上兔子？
<gadget id="calculator">9 - 8</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">10 * 9</gadget>
<output>90</output>

<result>90</result>