A cuboid swimming pool is 50 meters long, 40 meters wide, and 3 meters deep. Paint the bottom and surrounding areas of the pool. If 100 grams of paint is used per square meter, how many kilograms of paint are needed to paint the pool?
一个长方体游泳池，长50米，宽40米，深3米，在池子的底面及四周刷上油漆，如果每平方米用油漆100克，刷这个池子一共需要多少千克油漆？
<gadget id="calculator">50 * 40</gadget>
<output>2_000</output>

<gadget id="calculator">50 * 3 * 2</gadget>
<output>300</output>

<gadget id="calculator">40 * 3 * 2</gadget>
<output>240</output>

<gadget id="calculator">2_000 + 300 + 240</gadget>
<output>2_540</output>

<gadget id="calculator">100 / 1_000</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">2_540 * (1/10)</gadget>
<output>254</output>

<result>254</result>