The same number is subtracted from the numerator and denominator of (27/35) at the same time, and after division, it is (3/4). What is the number that is subtracted from the numerator and denominator at the same time?
(27/35)的分子和分母同时减去一个相同的数，约分后是(3/4)，分子和分母同时减去的数是多少？
<result>3</result>