In a swimming pool with a length of 50 meters, a width of 40 meters, and a height of 2 meters, tiles are placed on the walls and bottom of the swimming pool. The tiles cost 30 yuan per square meter. How much is the total cost?
在一个长是50米，宽是40米，高是2米的游泳池四壁和底部贴瓷砖，每平方米瓷砖需要30元，一共需要多少元钱？
<gadget id="calculator">50 * 40</gadget>
<output>2_000</output>

<gadget id="calculator">50 * 2 * 2</gadget>
<output>200</output>

<gadget id="calculator">40 * 2 * 2</gadget>
<output>160</output>

<gadget id="calculator">2_000 + 200 + 160</gadget>
<output>2_360</output>

<gadget id="calculator">2_360 * 30</gadget>
<output>70_800</output>

<result>70_800</result>