The sidewalk is 150 meters long and 3 meters wide, and is paved with square cement bricks with a side length of 3 decimeters. How many such cement bricks are needed?
人行道长150米，宽3米，用边长是3分米的正方形水泥砖铺地，需要多少块这样的水泥砖？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) * (3/10)</gadget>
<output>9/100 = around 0.09</output>

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

<gadget id="calculator">150 * (100/3)</gadget>
<output>5_000</output>

<result>5_000</result>