Dig a cylindrical cistern. The perimeter of the cistern is 9.42 meters and the depth is 2.5 meters. Now put cement on the bottom and inner wall of the cistern. It is known that 2.4 kilograms of cement is used per square meter, how many kilograms of cement are needed in total?
挖一个圆柱型的蓄水池，蓄水池的底面周长是9.42米，池深2.5米，现在将蓄水池底面和内壁抹上水泥．已知每平方米用水泥2.4千克，一共需要多少千克水泥？
<gadget id="calculator">9.42 * 2.5</gadget>
<output>23.55</output>

<gadget id="calculator">9.42 / 3.14</gadget>
<output>3</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">3.14 * (9/4)</gadget>
<output>7.065</output>

<gadget id="calculator">23.55 + 7.065</gadget>
<output>30.615</output>

<gadget id="calculator">2.4 * 30.615</gadget>
<output>73.476</output>

<result>73.476</result>