Xiao Ming has a lockbox, the password consists of three digits, and each digit can appear from 0 to 9 numbers. Xiao Ming only remembers that the second password is 9, so how many times does he need to try to open the lockbox.
小明有一个密码箱，密码由三位数字组成，每一位都可以出现0--9个数字，小明只记得第二位密码是9，那么他需要尝试多少次才能打开密码箱．
<gadget id="calculator">10 * 1 * 10</gadget>
<output>100</output>

<result>100</result>