There are 4 roads from Xiaohua's house to the school, and 3 roads from the school to the park. How many different ways are there to go from Xiaohua's house to the park through the school?
从小华家到学校有4条路，从学校到公园有3条路，从小华家经过学校到公园有多少种不同的走法．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>