Pingping is 8 years old this year, and her father will be five times her age next year. How old is her father this year?
萍萍今年8岁，明年爸爸的年龄就是她的5倍，爸爸今年多少岁？
<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<gadget id="calculator">45 - 1</gadget>
<output>44</output>

<result>44</result>