Add 5 to the teacher's age, subtract 3, multiply by 4, and divide by 5 to get 24. How old is the teacher?
老师的年龄加上5，减去3，乘以4，除以5是24．老师的年龄是多少岁．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">24 * (5/4)</gadget>
<output>30</output>

<gadget id="calculator">3 - 5</gadget>
<output>-2</output>

<gadget id="calculator">30 + (-2)</gadget>
<output>28</output>

<result>28</result>