A swimming pool is 50 meters long, 25 meters wide, and has an average water depth of 2.5 meters. A layer of cement should be applied to the walls and bottom. If 5 kg of cement is used per square meter, how many kg of cement are needed in total?
一个游泳池长50米，宽25米，平均水深2.5米，要在四壁和底部抹一层水泥．如果每平方米用水泥5千克，共需水泥多少千克？
<gadget id="calculator">50 * 25</gadget>
<output>1_250</output>

<gadget id="calculator">50 * 2.5</gadget>
<output>125</output>

<gadget id="calculator">25 * 2.5</gadget>
<output>62.5</output>

<gadget id="calculator">1_250 + 125 + 62.5</gadget>
<output>1_437.5</output>

<gadget id="calculator">1_437.5 * 2</gadget>
<output>2_875</output>

<gadget id="calculator">2_875 - 1_250</gadget>
<output>1_625</output>

<gadget id="calculator">1_625 * 5</gadget>
<output>8_125</output>

<result>8_125</result>