There were 552 tourists in the zoo in the morning, and 272 people left at noon. Another 308 people came in the afternoon. How many tourists were there in the park at this time?
动物园上午有游客552人，中午有272人离去．下午又来了308人，这时园内有多少游客？
<gadget id="calculator">552 - 272</gadget>
<output>280</output>

<gadget id="calculator">280 + 308</gadget>
<output>588</output>

<result>588</result>