This year, Teacher Li is 32 years old, Teacher Wang is 28 years old, Teacher Zhang is 44 years old, and Teacher Liu is 40 years old. What is their average age?
今年李老师32岁，王老师28岁，张老师44岁，刘老师40岁，那么他们的平均年龄是多少岁？
<gadget id="calculator">32 + 28 + 44 + 40</gadget>
<output>144</output>

<gadget id="calculator">144 / 4</gadget>
<output>36</output>

<result>36</result>