The length of the classroom is 9 meters, and the width is 6 meters. If you use rectangular bricks with a length of 60 cm and a width of 30 cm to pave the floor, how many such bricks are needed?
教室的长是9米，宽是6米，如果用长60厘米，宽30厘米的长方形砖铺地面，需多少块这样的砖？
<gadget id="calculator">30 / 10_000</gadget>
<output>3/1_000 = around 0.003</output>

<gadget id="calculator">60 * (3/1_000)</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">6 / (9/50)</gadget>
<output>100/3 = around 33.333333</output>

<gadget id="calculator">9 * (100/3)</gadget>
<output>300</output>

<result>300</result>