The school recently bought 12 sets of desks and chairs for students. The total cost is 1440 yuan, of which 80 yuan per table. How much is each chair? (solution with equation)
学校最近买来了12套学生桌椅，一共花了1440元，其中每张桌子80元，每把椅子多少元？(用方程解答)
<gadget id="calculator">12 * 80</gadget>
<output>960</output>

<gadget id="calculator">1_440 - 960</gadget>
<output>480</output>

<gadget id="calculator">480 / 12</gadget>
<output>40</output>

<result>40</result>