In the new classroom, use bricks to build a platform with a length of 2.5 meters, a width of 1.4 meters, and a height of 4 decimeters. If 525 bricks are used per cubic meter, how many bricks are needed in total?
在新教室里用砖砌一个长2.5米，宽1.4米，高4分米的讲台．如果每立方米用砖525块，一共需要多少块砖？
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2.5 * 1.4 * (2/5)</gadget>
<output>1.4</output>

<gadget id="calculator">525 * 1.4</gadget>
<output>735</output>

<result>735</result>