Uncle Wang remembered the first five digits of Uncle Li’s seven-digit phone number: 76045. He also remembered that the largest number was 7, and each number was not repeated, but he forgot what the last two digits were. Uncle Wang wanted to call Li Uncle's phone number, how many times do you have to try at most?
王叔叔记得李叔叔的七位电话号码的前五位数：76045口口，还记得其中最大数字是7，各个数字又不重复，但忘记最后两位数字是什么了，王叔叔要拨通李叔叔的电话，最多要试打多少次．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>