There are 3 ways for Xiaohua to go to the school, and 3 ways for Xiaohua to go from the school to the park. Then, how many different ways are there for Xiaohua to go through the school and then to the park?
小华到学校有3条路，学校到公园有3条路，那么，小华经过学校再到公园，共有多少种不同走法．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>