There are 46 students in a certain class, 27 of them can ride a bicycle, 14 can swim, 5 can ride a bicycle and swim, and how many can neither.
某班有46人，其中会骑车的有27人，会游泳的有14人，既会骑车又会游泳的有5人，两样都不会的有多少人．
<gadget id="calculator">14 - 5</gadget>
<output>9</output>

<gadget id="calculator">27 + 9</gadget>
<output>36</output>

<gadget id="calculator">46 - 36</gadget>
<output>10</output>

<result>10</result>