There is a classroom with a length of 8 meters and a width of 6 meters with ceramic tiles on the floor. Each tile is a parallelogram with a base of 4 decimeters and a height of 2.5 decimeters. How many such tiles are needed to cover the floor of this classroom?
有一间长8米，宽6米的教室地面贴瓷砖．每块瓷砖是平行四边形，底为4分米，高为2.5分米．把这间教室地面铺满，所需这样的瓷砖多少块？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2.5 / 10</gadget>
<output>0.25</output>

<gadget id="calculator">(2/5) * 0.25</gadget>
<output>0.1</output>

<gadget id="calculator">48 / 0.1</gadget>
<output>480</output>

<result>480</result>