The school bought 16 sets of school uniforms for students, and the total cost is 720 yuan. It is known that each pair of trousers is 20 yuan, and how much is each jacket?
学校买来学生校服16套，共用去720元，已知裤子每条20元，上衣每件多少元？
<gadget id="calculator">720 / 16</gadget>
<output>45</output>

<gadget id="calculator">45 - 20</gadget>
<output>25</output>

<result>25</result>