Grandpa is 69 years old this year, and his age is 5 times that of Xiao Ming's and is 4 years older. How old is Xiao Ming?
爷爷今年69岁，爷爷的年龄比小明年龄的5倍还大4岁．小明今年几岁？
<gadget id="calculator">69 - 4</gadget>
<output>65</output>

<gadget id="calculator">65 / 5</gadget>
<output>13</output>

<result>13</result>