A classroom is 9.5 meters long and 6.5 meters wide. How many square bricks with a side length of 5 decimeters are needed to pave the floor?
一间教室长是9.5米，宽是6.5米，用边长5分米的方砖铺地至少需要多少块？
<gadget id="calculator">9.5 * 6.5</gadget>
<output>61.75</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">61.75 / (1/4)</gadget>
<output>247</output>

<result>247</result>