The side length of a square is 4 decimeters. If 36 such squares are used to form a large square, what is the area of the large square?
一个正方形的边长是4分米，用36个这样的正方形拼成一个大正方形，大正方形的面积是多少．
<gadget id="calculator">4 * 4 * 36</gadget>
<output>576</output>

<result>576</result>