The 2014 Winter Olympics was held in Sochi, Russia from February 7 to February 23. How many days did the Winter Olympics last?
2014年冬季奥运会于2月7日至2月23日在俄罗斯索契市举行，本届冬奥会持续了多少天？
<gadget id="calculator">23 - 7</gadget>
<output>16</output>

<gadget id="calculator">16 + 1</gadget>
<output>17</output>

<result>17</result>