How many bricks are needed to pave a floor 6 meters long and 4 meters wide with bricks 3 decimeters long and 2 decimeters wide?
用长3分米，宽2分米的砖，铺长6米，宽4米的地面，需要多少块砖．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(3/10) * (1/5)</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">4 / (3/50)</gadget>
<output>200/3 = around 66.666667</output>

<gadget id="calculator">6 * (200/3)</gadget>
<output>400</output>

<result>400</result>