How many five-digit numbers can be formed with the five numbers 9, 8, 7, 6, and 5 without repeating numbers?
用9、8、7、6、5这五个数字可以组成多少个没有重复数字的五位数．
<gadget id="calculator">24 * 5</gadget>
<output>120</output>

<result>120</result>