\overline{careful}*\overline{careful}+fine=\overline{careful}*\overline{mental arithmetic} is composed of 4 numbers 1, 2, 3, 4, and the same Chinese characters represent the same number, Different Chinese characters represent different numbers, so what is the four-digit number represented by "\overline{careful mental calculation}"?
\overline{仔细}*\overline{仔细}+细=\overline{细心}*\overline{心算}是由1、2、3、4这4个数字组成的，且相同的汉字代表相同的数字，不同的汉字代表不同的数字，那么"\overline{仔细心算}"所代表的四位数是多少？
<result>2_134</result>