这个数目精确到小数点后三位数。

The number is correct to three decimal places.

《牛津词典》

它直接把小数点后面的数值丢弃掉了，因为，凭直觉，那些整型数和结果应该是一个浮点数据，但是我需要一个更精确的数值。

It just throws the decimal point away and that's because, again, these are ints and the answer intuitively should be a floating point value, but I need to be more specific.

youdao

Lehrer：你是如何能背诵圆周率小数点后22514位数的？

LEHRER: How were you able to recite from memory the first 22, 514 Numbers of Pi?

youdao