The school needs to build a brick wall with a length of 15 meters, a thickness of 24 centimeters and a height of 3 meters. If 525 bricks are used per cubic meter, how many bricks are needed at least?
学校要砌一道长15米，厚24厘米，高3米的砖墙，如果每立方米用砖525块，至少需要多少块砖？
<gadget id="calculator">15 * 0.24 * 3</gadget>
<output>10.8</output>

<gadget id="calculator">10.8 * 525</gadget>
<output>5_670</output>

<result>5_670</result>