Use square bricks with a side length of 30 cm to pave a section of pavement with a length of 72 meters and a width of 3 meters. How many such square bricks are needed at least?
用边长是30厘米的正方形方砖铺一段长72米、宽3米的人行路面，至少需要多少块这样的方砖？
<gadget id="calculator">30 / 100</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">72 * (100/3)</gadget>
<output>2_400</output>

<result>2_400</result>