two-digit number is an even number, and the ten-digit number is an odd number. The product of the tens-digit number and the one-digit number is 20. What is the two-digit number?
一个两位数，是一个偶数，十位数字是奇数，十位数字与个位数字的积是20，这个两位数是多少？
<result>54</result>