On the day of the Dragon Boat Festival, 25 elderly people came to Shanghu Park to taste tea. Their ages are exactly 25 consecutive natural numbers. Two years later, the sum of the ages of these 25 old people is exactly 1500. How old is the oldest old man?
端午那天，尚湖公园来了25位老人品茶．他们的年龄恰好是25个连续的自然数，两年以后，这25位老人的年龄之和恰好是1500，请问其中年龄最大的老人今年多少岁？
<gadget id="calculator">46 + 24</gadget>
<output>70</output>

<result>70</result>