The students are in a rope skipping competition. Except for Wang Wei, the rest of the students jump 152 times on average. Including Wang Wei, the average jump is 150 times per person. If Wang Wei jumps 140 times, how many students are there in total? Have a jump rope competition?
同学们在进行跳绳比赛，除王伟外，其余同学平均每人跳152下，而王伟算在内，平均每人跳150下，如果王伟跳了140下，那么一共有多少个同学在进行跳绳比赛？
<gadget id="calculator">152 - 140</gadget>
<output>12</output>

<gadget id="calculator">152 - 150</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>