A rectangular dance room is 15 meters long and 9 meters wide. How many floor tiles are needed to pave this dance studio with square floor tiles with an area of 9 square decimeters?
一个长方形的舞蹈室，长15米，宽9米．如果用面积为9平方分米的正方形的地板砖铺这个舞蹈室，需要多少块地板砖？
<gadget id="calculator">9 / 0.09</gadget>
<output>100</output>

<gadget id="calculator">15 * 100</gadget>
<output>1_500</output>

<result>1_500</result>