The living room is 4 meters long and 6 meters wide. The floor is paved with floor tiles with a side length of 4 decimeters at 70 yuan. How much does it cost to buy floor tiles for this living room?
客厅长4米，宽6米，用70元一块的边长4分米地砖铺地，铺好这个客厅需要花多少钱购买地砖？
<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">4 / 10</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">24 / (4/25)</gadget>
<output>150</output>

<gadget id="calculator">150 * 70</gadget>
<output>10_500</output>

<result>10_500</result>