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Why don't you understand this joke?

The root number 2 is accurate to three decimal places, indicating' meaning', that is, 1.4 14. Look at 14 14 without looking at the decimal point. There are two reasons why class representatives are embarrassed: one is that they forget the specific figures, and the other is that it is interesting to remember the answers.

It's really embarrassing to be accurate to the last five. The reasons are: first, I forgot the specific figures; Second, I think this answer is very interesting.