Teacher Wang’s age is four times that of Xiao Ming’s. In the year after tomorrow, Teacher Wang’s age is three times that of Xiao Ming’s. How old is Teacher Wang this year? (column calculation)
王老师的年龄是小明的4倍，后年，王老师的年龄是小明的3倍，王老师今年是多少岁？(列式计算)
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

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

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>