5 years ago, the age of the mother was 5 times that of Xiao Ming, and the sum of the ages of the mother and child 5 years later was 62 years old. How old is Xiao Ming this year?
5年前妈妈年龄是小明的5倍，5年后母子的年龄之和是62岁，问小明今年几岁？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">62 - 20</gadget>
<output>42</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">42 / 6</gadget>
<output>7</output>

<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<result>12</result>