There are 72 people in the skating rink in the morning, 44 people leave at noon, and 85 people arrive again. How many people are skating now?
滑冰场上午有72人，中午有44人离去，又有85人到来．现在有多少人滑冰？
<gadget id="calculator">72 - 44</gadget>
<output>28</output>

<gadget id="calculator">28 + 85</gadget>
<output>113</output>

<result>113</result>