A cylindrical tin bucket (without a lid) is 10 decimeters high and the diameter of the bottom is (3/4) high. How much iron sheet does it take to make this bucket?
一个圆柱形铁皮水桶(无盖)，高10分米，底面直径是高的(3/4)．做这个水桶大约要用多少铁皮？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / 2</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">3.14 * 10 * (3/8) * 2 * 10</gadget>
<output>235.5</output>

<gadget id="calculator">10 * (3/8)</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">(15/4) ** 2</gadget>
<output>225/16 = around 14.0625</output>

<gadget id="calculator">3.14 * (225/16)</gadget>
<output>44.15625</output>

<gadget id="calculator">235.5 + 44.15625</gadget>
<output>279.65625</output>

<result>279.65625</result>