An isosceles right-angled triangular wooden plank, the length of the right angle side is 5dm, if this kind of wooden plank is used to pave the floor of a room with a length of 5.5m and a width of 4m, how many such planks are needed?
一种等腰直角三角形木板，直角边长是5dm，如果用这种木板铺地，铺一个长5.5m、宽4m的房间地面，需要这样的木板多少块？
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) * (1/4)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">4 / (1/8)</gadget>
<output>32</output>

<gadget id="calculator">5.5 * 32</gadget>
<output>176</output>

<result>176</result>