On May Day, 402 people came to the amusement park in the morning, 209 people left at noon, and 178 people came in the afternoon. How many people came to the amusement park on May 1st?
五一当天，游乐园上午来了402人，中午有209人离去，下午又来了178人．游乐园五一这天一共来过多少人？
<gadget id="calculator">402 + 178</gadget>
<output>580</output>

<result>580</result>