The circumference of a circular flower bed is 50.24 meters, of which (3/8) is lawn, how big is the lawn?
一个圆形花坛的周长是50.24米，其中有(3/8)的面积是草坪，草坪的面积有多大？
<gadget id="calculator">50.24 / 3.14 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">3.14 * 64 * (3/8)</gadget>
<output>75.36</output>

<result>75.36</result>