The longest lifespan of a hippopotamus is 52 years, which is 2 years less than that of a sea turtle. What is the longest lifespan of a sea turtle?
一只河马的最长寿命是52年，比一只海龟的寿命少2年，一只海龟最长的寿命是多少？
<gadget id="calculator">52 + 2</gadget>
<output>54</output>

<result>54</result>