There are 534 tourists in the zoo in the morning, 234 people leave at noon, and 378 people come in the afternoon. How many people are there at this time?
动物园上午有游客534人，中午有234人离去，下午又来378人，这时游园有多少人？
<gadget id="calculator">534 - 234</gadget>
<output>300</output>

<gadget id="calculator">300 + 378</gadget>
<output>678</output>

<result>678</result>