A classroom is 12.5 meters long and 6.8 meters wide, and the floor is paved with square bricks with an area of 0.5m**2. How many bricks are needed?
一间教室长12.5米，宽6.8米，用面积0.5米**2的方砖铺地，需要多少块？
<gadget id="calculator">6.8 / 0.5</gadget>
<output>13.6</output>

<gadget id="calculator">12.5 * 13.6</gadget>
<output>170</output>

<result>170</result>