The side length of a square brick is 0.5 meters, and a classroom can only be covered with 160 bricks of this kind, so how many square meters is the area of this classroom?
一种方砖的边长是0.5米，一间教室用这种砖160块才能铺满，那么这间教室的面积是多少平方米？
<gadget id="calculator">0.5 * 0.5 * 160</gadget>
<output>40</output>

<result>40</result>