The school has a circular flower garden with a circumference of 28.26 meters. If it costs 30 yuan per square meter to beautify the flower garden, how much is the minimum cost to beautify the flower garden?
学校有一个圆形花圃，周长是28.26米，如果美化这个花圃每平方米需用30元，那么美化好这个花圃至少需要多少元？
<gadget id="calculator">28.26 / 3.14 / 2</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 ** 2</gadget>
<output>20.25</output>

<gadget id="calculator">3.14 * 20.25 * 30</gadget>
<output>1_907.55</output>

<result>1_907.55</result>