The living room of Congcong’s house is 8 meters long and 5 meters wide. How many square floor tiles with a side length of 4 decimeters should be laid at least?
聪聪家的客厅长8米，宽5米，准备铺上边长为4分米的正方形地砖，至少需要多少块？
<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 * 5 * (25/4)</gadget>
<output>250</output>

<result>250</result>