Xiaolin's living room is 6 meters long and 4.5 meters wide, and the floor is paved with square floor tiles with a side length of 50 cm. How many floor tiles are needed?
小林家的客厅长6米，宽4.5米，用边长50厘米的正方形地砖铺地面，需要多少块地砖？
<gadget id="calculator">50 / 100</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">4.5 / (1/4)</gadget>
<output>18</output>

<gadget id="calculator">6 * 18</gadget>
<output>108</output>

<result>108</result>