If 3 squares with side length 5 cm are used to form a rectangle, what is the area of the resulting rectangle?
用3个边长5厘米的正方形拼成一个长方形，拼成的长方形的面积是多少平方厘米．
<gadget id="calculator">5 * 5 * 3</gadget>
<output>75</output>

<result>75</result>