The master worker wants to tile the inner wall and bottom of a small swimming pool with a length of 40m, a width of 30m, and a height of 3m. During the work, the consumption of tiles is 6m**2. How much m**2 are the minimum tiles used?
工人师傅要给一个长40m，宽30m，高3m的小型游泳池内壁及底面贴瓷砖，工作中损耗瓷砖6m**2，最少用去瓷砖多少m**2？
<gadget id="calculator">40 * 30</gadget>
<output>1_200</output>

<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">120 + 90</gadget>
<output>210</output>

<gadget id="calculator">210 * 2</gadget>
<output>420</output>

<gadget id="calculator">1_200 + 420 + 6</gadget>
<output>1_626</output>

<result>1_626</result>