The hunter went to the hunting dog to hunt, and found that the rabbit had just run 40 meters, and the hunting dog went to chase the rabbit. It is known that the rabbit runs 3 steps in the time it takes for the hound to run 2 steps, and the distance that the hound runs 4 steps is equal to the distance that the rabbit runs 7 steps. How far can the rabbit run so that the hound can catch it?
猎人到猎狗去捕猎，发现兔子刚跑出40米，猎狗去追兔子．已知猎狗跑2步的时间兔子跑3步，猎狗跑4步的距离与兔子跑7步的距离相等，求兔再跑多远，猎狗可以追到它？
<gadget id="calculator">7 / 6</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">(7/6) - 1</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">40 / (1/6)</gadget>
<output>240</output>

<result>240</result>