A cuboid swimming pool is 50 meters long, 25 meters wide, and 1.8 meters high. If a layer of cement is applied on the four walls and the bottom of the pool, how many square meters of cement should be applied at least?
一个长方体游泳池长50米，宽25米，高1.8米，如果在四壁和池底抹一层水泥，那么至少需要抹多少平方米的水泥？
<gadget id="calculator">50 * 25</gadget>
<output>1_250</output>

<gadget id="calculator">50 * 1.8</gadget>
<output>90</output>

<gadget id="calculator">25 * 1.8</gadget>
<output>45</output>

<gadget id="calculator">90 + 45</gadget>
<output>135</output>

<gadget id="calculator">135 * 2</gadget>
<output>270</output>

<gadget id="calculator">1_250 + 270</gadget>
<output>1_520</output>

<result>1_520</result>