There were 856 people in the Science and Technology Park in the morning and 256 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856人，中午有256人离去．下午又来了403位游客，这时园内有多少位游客？
<gadget id="calculator">856 - 256</gadget>
<output>600</output>

<gadget id="calculator">600 + 403</gadget>
<output>1_003</output>

<result>1_003</result>