The lawn is made up of pieces of turf, and each piece of turf is a square with a side length of 6 decimeters. With 25 yuan of such turf, how much area can be paved?
草坪是一块块的草皮拼起来的，每块草皮是边长6分米的正方形．用这样的草皮25块，能铺多大面积？
<gadget id="calculator">6 * 6 * 25</gadget>
<output>900</output>

<result>900</result>