Make a wooden cover for a large iron pot with a diameter of 0.96 meters. The diameter of the wooden cover is 4 cm larger than the diameter of the mouth of the large iron pot. A piece of iron is nailed along the side of the wooden cover. How long is the iron piece?
给直径是0.96米的大铁锅做一个木盖，木盖的直径比大铁锅的锅口直径大4厘米，沿木盖的边钉一条铁片，铁片长多少米？
<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">0.96 + (1/25)</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<result>3.14</result>