A circular flowerbed has a diameter of 8 meters and three quarters of orchids are used. What is the planting area of orchids?
一个圆形花圃直径8米，用四分之三种兰花，兰花的种植面积是多少？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3.14 * 16 * (3/4)</gadget>
<output>37.68</output>

<result>37.68</result>