A two-digit number, the number on the tenths place is 2 greater than the number on the percentile, and a new two-digit decimal is obtained by exchanging the number on the tenths place with the number on the percentile, and the original two-digit decimal is the same as The new number after adding the two decimal places is 6.66. What is the original two decimal places?
一个两位数，十分位上的数字比百分位上的数字大2，将十分位上的数字与百分位上的数字交换位置后得到一个新的两位小数，原来的两位小数与新的两位小数相加后得数是6.66．原来的两位小数是多少？
<result>3.42</result>