英语翻译A rabbit was 60 of her own leaps in front,while being ch

英语翻译
A rabbit was 60 of her own leaps in front,while being chased by a dog,and took three leaps while the dog took two.But the dog went as far in three leaps as the rabbit did in seven.In how many leaps did the dog catch the rabbit?
实在看不懂题的意思,不是说兔子跑2圈狗跑3圈吗,怎么后面又提到狗跑3圈相当于兔子跑7圈了呢?越看越糊涂,求中文翻译,