There are 852 tourists in the botanical garden in the morning, 265 tourists leave at noon, and 403 tourists come in the afternoon. How many tourists are there in the garden at this time?
植物园上午有游客852名，中午有265名游客离去，下午又来了403名游客，这时园内有多少名游客？
<gadget id="calculator">852 - 265</gadget>
<output>587</output>

<gadget id="calculator">587 + 403</gadget>
<output>990</output>

<result>990</result>