A cylindrical iron bucket (without a cover) is 16 decimeters high, and the diameter of the bottom surface is high (3/4). How much iron is used to make this bucket?
一个圆柱形铁皮水桶(无盖)，高16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">16 * (3/4)</gadget>
<output>12</output>

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

<gadget id="calculator">12 / 2</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">602.88 + 113.04</gadget>
<output>715.92</output>

<result>715.92</result>