There are 39 pairs of chess and checkers in the school activity room, which can be used by 182 people for activities. Two people play a chess set, and 6 people play a set of checkers. How many sets of checkers are there?
学校活动室有象棋、跳棋共39副，恰好可以供182人进行活动，象棋2人下一副，跳棋6人下一副．跳棋一共有几副？
<gadget id="calculator">39 * 2</gadget>
<output>78</output>

<gadget id="calculator">182 - 78</gadget>
<output>104</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">104 / 4</gadget>
<output>26</output>

<result>26</result>