Build a cuboid swimming pool with a length of 30 meters, a width of 10 meters, and a depth of 2 meters. The walls and bottom of the pool are paved with tiles. If 20 tiles are used per square meter, how many tiles are needed in total?
建造一个长方体游泳池，长30米，宽10米，深2米，池的四壁和底面用瓷砖铺砌．如果每平方米用瓷砖20块，一共需要瓷砖多少块？
<gadget id="calculator">30 * 10</gadget>
<output>300</output>

<gadget id="calculator">30 * 2 * 2</gadget>
<output>120</output>

<gadget id="calculator">10 * 2 * 2</gadget>
<output>40</output>

<gadget id="calculator">300 + 120 + 40</gadget>
<output>460</output>

<gadget id="calculator">460 * 20</gadget>
<output>9_200</output>

<result>9_200</result>