A swimming pool is 48 meters long, 30 meters wide and 2 meters deep. To smear a layer of cement on the four walls and the bottom of this swimming pool, how many kilograms of cement are needed in total based on the calculation of 2 kilograms of cement per square meter?
一个游泳池，长48米，宽30米，深2米．要在这个游泳池的四壁和底面抹上一层水泥，按每平方米需用水泥2千克计算，一共需水泥多少千克？
<gadget id="calculator">48 * 30</gadget>
<output>1_440</output>

<gadget id="calculator">48 * 2 * 2</gadget>
<output>192</output>

<gadget id="calculator">30 * 2 * 2</gadget>
<output>120</output>

<gadget id="calculator">1_440 + 192 + 120</gadget>
<output>1_752</output>

<gadget id="calculator">1_752 * 2</gadget>
<output>3_504</output>

<result>3_504</result>