A sidewalk is 300 meters long and 6 meters wide, and is paved with marble square bricks with a side length of 5 decimeters. How many such square bricks are needed?
一条人行道长300米、宽6米，用边长是5分米的大理石方砖铺地，需要多少块这样的方砖？
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6 / (1/4)</gadget>
<output>24</output>

<gadget id="calculator">300 * 24</gadget>
<output>7_200</output>

<result>7_200</result>