The hunting dog is chasing the hare 150 meters ahead. It takes 5 steps for the wild dog to run 3 steps, and 7 steps for the hare to run 4 steps for the hunting dog. How many meters must the hunting dog run to catch up with the hare?
猎狗追赶前方150米处的野兔，野狗跑3步的时间野兔跑5步，猎狗跑4步的距离野兔要跑7步，猎狗至少跑出多少米才能追上野兔？
<result>3_150</result>