Xiao Ming's father is 32 years old this year, and Xiao Ming is 8 years old. Four years ago, his father's age was how many times that of Xiao Ming's.
小明的爸爸今年32岁，小明8岁，4年前爸爸的岁数是小明的多少倍．
<gadget id="calculator">32 - 4</gadget>
<output>28</output>

<gadget id="calculator">8 - 4</gadget>
<output>4</output>

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

<result>7</result>