There is a two-digit number, add the number "3" in front of it to get a three-digit number; add the number "3" after it to get a three-digit number; add a number "3" before and after it Get a four-digit number, the sum of the three numbers obtained is known to be 3600, find the original two-digit number.
有一个两位数，在它前面加上数字"3"可以得到一个三位数；在它后面加上数字"3"也得到一个三位数；在它前、后各加一个数字"3"得到一个四位数，已知得到的三个数总和为3600，求原来的两位数．
<result>14</result>