"Husband and wife lung slices" is a famous dish in Sichuan. The main ingredients are beef, tripe and beef louvers. The unit prices of them are 18 yuan, 26 yuan and 25 yuan per kilogram respectively. Mix these three ingredients with the same weight to make "Husband and wife lung slices", how much should be sold per kilogram?
"夫妻肺片"是四川的一道名菜，主要选料有牛肉、牛肚和牛百叶，它们每千克的单价分别为18元，26元、25元．把这三样选取同样重量混合制成"夫妻肺片"，每千克应售价多少元？
<gadget id="calculator">18 + 26 + 25</gadget>
<output>69</output>

<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

<gadget id="calculator">69 / 3</gadget>
<output>23</output>

<result>23</result>