There is a piece of fabric with a length of 40 decimeters and a width of 25 decimeters. Now the customer requests to cut it into small square pieces (no surplus), and the minimum number of pieces is required. How big is the area of the cut square piece?
有一块长40分米，宽25分米的布料，现在顾客要求把它裁成正方形小布块(不能有剩余)，块数又要求最少，那么裁成的正方形的布块面积有多大？
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>