Using the five numbers 1, 3, 5, 7, and 9, you can form 60 different three-digit numbers. Arrange these numbers in a row from small to large, then what is the 56th number.
用1、3、5、7、9这五个数字，可以排成60个不同的三位数．把这些数从小到大排成一排，那么排在第56个的数是多少．
<result>953</result>