Xiaohong is 10 years old this year, her father is 36 years old this year, how old is Xiaohong, her father's age is exactly three times that of Xiaohong.
小红今年10岁，她爸爸今年36岁，小红多少岁，爸爸的年龄正好是小红的3倍．
<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<result>13</result>