Build a cylindrical cistern with a perimeter of 12.56 meters and a depth of 2 meters. Plaster cement around it and on the bottom. If 30 kilograms of cement is used per square meter, how many kilograms of cement will be used in total?
修建一个圆柱形的蓄水池，底面周长是12.56米，深2米，在它的周围及底面抹水泥，若每平方米用水泥30千克，一共用水泥多少千克？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">12.56 + 25.12</gadget>
<output>37.68</output>

<gadget id="calculator">30 * 37.68</gadget>
<output>1_130.4</output>

<result>1_130.4</result>