The mouth of a water tank is a circle with a diameter of 0.75 meters. To make a wooden cover for this water tank, the diameter of the wooden cover needs to be 10 cm larger than the diameter of the tank mouth. What is the area of the wooden cover in square centimeters?
一个水缸的缸口是一个圆形，直径是0.75米．给这个水缸做一个木盖，需求木盖的直径比缸口直径大10厘米．木盖的面积是多少平方厘米？
<gadget id="calculator">0.75 * 100</gadget>
<output>75</output>

<gadget id="calculator">75 + 10</gadget>
<output>85</output>

<gadget id="calculator">85 / 2</gadget>
<output>85/2 = around 42.5</output>

<gadget id="calculator">(85/2) ** 2</gadget>
<output>7_225/4 = around 1_806.25</output>

<gadget id="calculator">3.14 * (7_225/4)</gadget>
<output>5_671.625</output>

<result>5_671.625</result>