A sidewalk is a rectangle with a length of 8m and a width of 1m. It is paved with cement square bricks with a side length of 4dm. How many bricks are needed to cover it.
有条人行道是长8m，宽1m的长方形，用边长是4dm的水泥方砖铺地，铺满需要多少块．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">100 / 16</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">8 * 1 * (25/4)</gadget>
<output>50</output>

<result>50</result>