For a three-digit number, the digit in the tens digit is 9, which is exactly three times the number in the one digit, and the sum of the three digits is 13. What is the three-digit number.
一个三位数，十位上的数字是9，正好是个位数字的3倍，三个数位之和是13．这个三位数是多少．
<result>193</result>