There is a cylindrical cistern, the bottom and sides of which are plastered with cement. It is known that the diameter of the bottom of the pool is 4 meters and the depth is 3 meters. If 10 kilograms of cement is used per square meter, how many kilograms of cement are needed in total?
有一个圆柱形蓄水池，池底和侧面都抹水泥，已知池底面直径是4米，深3米．如果每平方米用水泥10千克，那么共需要水泥多少千克？
<gadget id="calculator">3.14 * 4 * 3</gadget>
<output>37.68</output>

<gadget id="calculator">4 / 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">37.68 + 12.56</gadget>
<output>50.24</output>

<gadget id="calculator">10 * 50.24</gadget>
<output>502.4</output>

<result>502.4</result>