The sum of the ages of Xiao Ming and his father this year is 46 years old. Three years later, the age of his father is three times that of Xiao Ming. How old is Xiao Ming this year?
今年小明和爸爸的年龄和为46岁，三年后，爸爸的年龄是小明的3倍，则小明今年多少岁．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">46 + 6</gadget>
<output>52</output>

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

<gadget id="calculator">52 / 4</gadget>
<output>13</output>

<gadget id="calculator">13 - 3</gadget>
<output>10</output>

<result>10</result>