Class 51 decorated the classroom for New Year's Day. Teacher Zhang bought 50 balloons to decorate the classroom. He paid 30 yuan and got 0.5 yuan back. How much is each balloon?
五1班庆祝元旦布置教室，张老师买了50个气球布置教室，付出30元，找回0.5元，每个气球多少钱？
<gadget id="calculator">30 - 0.5</gadget>
<output>29.5</output>

<gadget id="calculator">29.5 / 50</gadget>
<output>0.59</output>

<result>0.59</result>