The combined age of Xiaomei and Zhang Fang is 39 years old. Xiaomei is 3 years older than Zhang Fang. How old is Zhang Fang?
小梅与张芳今年的年龄和是39岁，小梅比张芳大3岁，张芳今年多少岁．
<gadget id="calculator">39 - 3</gadget>
<output>36</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<result>18</result>