The school held an art festival and prepared 30 garlands and 30 balloons for a total of 180 yuan. Each balloon is 1.5 yuan, how much is each flower?
学校举办艺术节，准备了拉花和气球各30个，共用去180元．气球每个1.5元，每个拉花多少元？
<gadget id="calculator">180 / 30</gadget>
<output>6</output>

<gadget id="calculator">6 - 1.5</gadget>
<output>4.5</output>

<result>4.5</result>