swimming pool is 50 meters long, 20 meters wide, and 3 meters deep. It is necessary to paste tiles on the four walls and the bottom of the pool. How many square meters is the tiled area?
一个游泳池长50米、宽20米、深3米，要在四壁和池底贴上瓷砖，贴瓷砖的面积是多少平方米？
<gadget id="calculator">50 * 20</gadget>
<output>1_000</output>

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

<gadget id="calculator">20 * 3 * 2</gadget>
<output>120</output>

<gadget id="calculator">1_000 + 300 + 120</gadget>
<output>1_420</output>

<result>1_420</result>