There were 552 tourists in the Science and Technology Park in the morning, and 261 people left at noon. Another 403 tourists came in the afternoon. How many tourists are there in the park at this time?
科技园上午有游客552人，中午有261人离去．下午又来了403位游客，这时园内大约有多少游客？
<gadget id="calculator">552 - 265</gadget>
<output>287</output>

<gadget id="calculator">287 + 403</gadget>
<output>690</output>

<result>690</result>