The construction of a road started on May 9th and was completed on June 10th. How many days did it take to build this road?
一条公路从5月9日开工修建，到6月10日完工，这条路一共修了多少天．
<gadget id="calculator">31 - 9</gadget>
<output>22</output>

<gadget id="calculator">22 + 1 + 10</gadget>
<output>33</output>

<result>33</result>