Xiaoqiang added a 0 between the ones and tens digits of a two-digit number, and the resulting three-digit number is 90 more than the original number, which is exactly 6 times the original number. What is the original two-digit number?
小强在一个两位数的个位和十位中间添了一个0，所得的三位数比原数多90，正好是原数的6倍，原来的两位数是多少？
<result>18</result>