A children's swimming pool is 30 meters long, 10 meters wide, and 1.4 meters deep. It has white tiles on the bottom and sides. How many square meters is the area covered with white tiles?
一个儿童游泳池长30米，宽10米，深1.4米，在底部和四周贴白瓷砖，贴白瓷砖的面积是多少平方米？
<gadget id="calculator">30 * 10</gadget>
<output>300</output>

<gadget id="calculator">30 * 1.4 * 2</gadget>
<output>84</output>

<gadget id="calculator">10 * 1.4 * 2</gadget>
<output>28</output>

<gadget id="calculator">300 + 84 + 28</gadget>
<output>412</output>

<result>412</result>