A classroom is 8.6 meters long and 4.5 meters wide, and the floor is paved with square bricks with an area of 0.3 square meters. How many square bricks are needed?
一个教室长8.6米，宽4.5米，用每块面积是0.3平方米的方砖铺地，需要多少块这样的方砖？
<gadget id="calculator">4.5 / 0.3</gadget>
<output>15</output>

<gadget id="calculator">8.6 * 15</gadget>
<output>129</output>

<result>129</result>