Xiaohua's house needs to build a brick wall with a length of 20 meters, a thickness of 0.2 meters and a height of 3 meters. If 520 bricks are used per cubic meter, how many bricks are needed in total?
小华家要砌一面长20米，厚0.2米，高3米的砖墙．如果每立方米用砖520块，一共需要用多少块砖？
<gadget id="calculator">20 * 0.2 * 3</gadget>
<output>12</output>

<gadget id="calculator">520 * 12</gadget>
<output>6_240</output>

<result>6_240</result>