In the long jump competition, Zhang Ming jumped 3.1 meters, Li Jun jumped 2.9 meters, how many meters did Zhang Ming jump more than Li Jun?
跳远比赛，张明跳3.1米，李军跳2.9米，张明比李军多跳多少米？
<gadget id="calculator">3.1 - 2.9</gadget>
<output>0.2</output>

<result>0.2</result>