A part is made of a round iron sheet with a diameter of 3.2 meters. How many square meters of this iron sheet is needed to produce 100 pieces of this kind of part?
一个零件是用直径为3.2米的圆铁皮制成的，生产这种零件100个，需要这种铁皮多少平方米？
<gadget id="calculator">3.2 / 2</gadget>
<output>1.6</output>

<gadget id="calculator">1.6 ** 2</gadget>
<output>2.56</output>

<gadget id="calculator">3.14 * 2.56 * 100</gadget>
<output>803.84</output>

<result>803.84</result>