A large classroom is 12 meters long and 8 meters wide. The floor is covered with square floor tiles with a side length of 4 decimeters. How many floor tiles are needed?
一间大教室，长12米，宽8米，用边长是4分米的正方形地砖铺满地面，需要地砖多少块？
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * (2/5)</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">8 / (4/25)</gadget>
<output>50</output>

<gadget id="calculator">12 * 50</gadget>
<output>600</output>

<result>600</result>