Xiao Hua is 12 years old this year. Two years later, the age ratio between her and her grandfather is 2:9. May I ask how old is grandpa?
小华今年12岁，两年后她和爷爷的年龄比是2：9．请问爷爷今年多少岁？
<gadget id="calculator">12 + 2</gadget>
<output>14</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 * 9</gadget>
<output>63</output>

<gadget id="calculator">63 - 2</gadget>
<output>61</output>

<result>61</result>