A bedroom is paved with square bricks with a side length of 8 decimeters, and it costs 50 yuan. What is the minimum floor area of this bedroom?
一间卧室用边长为8分米的方砖铺地，要用50块．这间卧室地面面积至少多少平方米？
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * (4/5) * 50</gadget>
<output>32</output>

<result>32</result>