A rectangular swimming pool is 40 meters long, 30 meters wide, and 2 meters deep. Tiles are laid on the bottom and around. If you want to contract this project, how many square meters of tiles are you expected to buy?
一个长方形游泳池，长40米，宽30米，深2米，在底部和四周贴瓷砖，你要承包这项工程，预计买多少平方米的瓷砖？
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">60 + 80</gadget>
<output>140</output>

<gadget id="calculator">140 * 2</gadget>
<output>280</output>

<gadget id="calculator">30 * 40</gadget>
<output>1_200</output>

<gadget id="calculator">280 + 1_200</gadget>
<output>1_480</output>

<result>1_480</result>