To make a cylindrical iron bucket without a cover, the height is 16 decimeters, and the diameter of the bottom surface is high (3/4). How many square decimeters of iron sheet are used to make this bucket.
做一个无盖的圆柱形铁皮水桶，高16分米，底面直径是高的(3/4)，做这个水桶大约要用铁皮多少平方分米．
<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">16 * (3/8)</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">3.14 * 12 * 16</gadget>
<output>602.88</output>

<gadget id="calculator">113.04 + 602.88</gadget>
<output>715.92</output>

<result>715.92</result>