A rectangular living room with a length of 6 meters and a width of 4 meters is paved with square floor tiles with a side length of 40 cm. How many floor tiles are needed?
一间长方形客厅，长6米，宽4米，用边长40厘米的正方形地砖来铺，需要多少块地砖？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * (2/5)</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">4 / (4/25)</gadget>
<output>25</output>

<gadget id="calculator">6 * 25</gadget>
<output>150</output>

<result>150</result>