If 3 squares with side lengths of 5 cm are put together to form a rectangle, what is the area in square centimetres?
把3个边长是5厘米的正方形拼成一个长方形，面积是多少平方厘米．
<gadget id="calculator">5 * 5 * 3</gadget>
<output>75</output>

<result>75</result>