Three years ago, Teacher Zhang's age was five times that of Xiaofang's. Five years later, Teacher Zhang's age was three times that of Xiaofang's. How old is Teacher Zhang this year?
3年前，张老师的年龄是小芳的5倍，五年后，张老师的年龄是小芳的3倍．今年张老师多少岁．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(3/2) - (5/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">8 / (1/4)</gadget>
<output>32</output>

<gadget id="calculator">32 * (5/4)</gadget>
<output>40</output>

<gadget id="calculator">40 + 3</gadget>
<output>43</output>

<result>43</result>