《太平广记·卷四十·神仙四十》
不知到现在经过了多少甲子了。 
不知於今经几甲子耶？ 
I do not know how many years have passed since then.
<s>[INST] Convert the following English text into Classical Chinese: I do not know how many years have passed since then. [/INST] 不知於今经几甲子耶？ </s>
Convert the following English text into Classical Chinese: I do not know how many years have passed since then.
user
不知於今经几甲子耶？
assistant