There is an open-air cuboid swimming pool with a length of 50 meters, a width of 25 meters, and a water depth of 1.5 meters. If tiles are to be placed on the four walls and bottom of the swimming pool, how many square meters is the tiled part?
有一个露天的长方体游泳池，长50米，宽25米，水深1.5米，如果要在游泳池的四壁和底面贴瓷砖，那么贴瓷砖部分的面积是多少平方米？
<gadget id="calculator">50 * 25</gadget>
<output>1_250</output>

<gadget id="calculator">50 * 1.5</gadget>
<output>75</output>

<gadget id="calculator">25 * 1.5</gadget>
<output>37.5</output>

<gadget id="calculator">75 + 37.5</gadget>
<output>112.5</output>

<gadget id="calculator">112.5 * 2</gadget>
<output>225</output>

<gadget id="calculator">1_250 + 225</gadget>
<output>1_475</output>

<result>1_475</result>