The son is 5 years old, and the father is 33 years old. How many years later, the age of the father is 5 times that of the son.
儿子今年5岁，爸爸今年33岁．多少年后爸爸的年龄是儿子的5倍．
<gadget id="calculator">33 - 5</gadget>
<output>28</output>

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

<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<result>2</result>