《淮南子·天文训》
这个数乘上一倍，也就是南北极相距离的数，也即是三万六千里。
倍之，南北之里数也。
This number multiplied by a hundred is the number of the distance between the North and South Poles, which is thirty-six thousand li.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 倍之，南北之里数也。 [/INST] This number multiplied by a hundred is the number of the distance between the North and South Poles, which is thirty-six thousand li.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 倍之，南北之里数也。
user
This number multiplied by a hundred is the number of the distance between the North and South Poles, which is thirty-six thousand li.
assistant