A classroom is 8 meters long and 6 meters wide. If square bricks with a side length of 0.5 meters are used to pave the floor, how many square bricks are needed at least?
一间教室长8米，宽6米，如果用边长0.5米的方砖铺地，至少需要多少块方砖？
<gadget id="calculator">0.5 * 0.5</gadget>
<output>0.25</output>

<gadget id="calculator">6 / 0.25</gadget>
<output>24</output>

<gadget id="calculator">8 * 24</gadget>
<output>192</output>

<result>192</result>