There are 80 seats in the school music classroom, and the library has 4 times the seats in the music classroom. How many seats are there in the school library?
学校音乐教室有80个座位，图书馆的座位是音乐教室座位的4倍，学校图书馆共有多少个座位？
<gadget id="calculator">80 * 4</gadget>
<output>320</output>

<result>320</result>