A classroom is 13 meters long and 8.1 meters wide. The floor is paved with square bricks with an area of 0.09 square meters. How many square bricks are needed?
一间教室长13米，宽8.1米，用面积为0.09平方米的方砖铺地面，需要这种方砖多少块？
<gadget id="calculator">8.1 / 0.09</gadget>
<output>90</output>

<gadget id="calculator">13 * 90</gadget>
<output>1_170</output>

<result>1_170</result>