Lay tiles on the floor of a classroom that is 8 meters long and 6 meters wide. Each tile is a rectangle with a length of 4 decimeters and a width of 3 decimeters. How many tiles are needed to cover the floor of this classroom?
在一间长8米、宽6米的教室地面上贴瓷砖．每块瓷砖是长方形，长为4分米，宽为3分米．把这间教室地面铺满，需要这样的瓷砖多少块？
<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">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(2/5) * (3/10)</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">48 / (3/25)</gadget>
<output>400</output>

<result>400</result>