There are 786 tourists in the botanical garden in the morning, 395 people leave at noon, and 218 tourists come in the afternoon. How many tourists are there in the garden at this time?
植物园内上午有游客786人，中午有395人离开，下午又来了218位游客，这时园内有多少位游客？
<gadget id="calculator">786 - 395</gadget>
<output>391</output>

<gadget id="calculator">391 + 218</gadget>
<output>609</output>

<result>609</result>