A cuboid swimming pool is 130m long, 90m wide, and 3m deep. The walls and bottom of the pool are coated with cement, and 4kg of cement is used per square meter. How many kilograms of cement are needed in total?
一个长方体游泳池长130m，宽90m，深3m，在池的四壁和底面涂上水泥，每平方米用水泥4kg，共需水泥多少千克？
<gadget id="calculator">130 * 90</gadget>
<output>11_700</output>

<gadget id="calculator">130 * 3</gadget>
<output>390</output>

<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<gadget id="calculator">390 + 270</gadget>
<output>660</output>

<gadget id="calculator">660 * 2</gadget>
<output>1_320</output>

<gadget id="calculator">11_700 + 1_320</gadget>
<output>13_020</output>

<gadget id="calculator">13_020 * 4</gadget>
<output>52_080</output>

<result>52_080</result>