A room is 15 meters long and 12 meters wide. How many square floor tiles are needed to pave the floor with an area of 9 square decimeters?
一间房间的长是15米，宽12米，用面积是9平方分米的正方形地砖铺地，需要多少块？
<gadget id="calculator">12 / 9</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">15 * (4/3)</gadget>
<output>20</output>

<result>20</result>