There are three ancient and famous trees in the park. The first old tree is 480 years old, the second old tree is 175 years old, and the third old tree is older than the sum of the first two old trees. More than 20 years. What is the age of the third ancient tree?
公园里有3棵古树名木，第一棵古树的树龄是480年，第二棵古树的树龄是175年，第三棵古树的树龄比前两棵古树的树龄之和还多20年．第三棵古树的树龄是多少？
<gadget id="calculator">480 + 175 + 20</gadget>
<output>675</output>

<result>675</result>