The floor of a classroom is 6 meters long and 4 meters wide. If square bricks with a side length of 2 decimeters are used to pave the floor, how many bricks are needed? (proportional solution)
一间教室的地面长6米，宽4米，如用边长2分米的正方形砖铺地，共需这样的砖多少块？(比例解)
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (1/5)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">24 / (1/25)</gadget>
<output>600</output>

<result>600</result>