How many small squares with a side length of 1 cm can be assembled to form a large square with a side length of 5 cm.
用多少个边长是1厘米的小正方形才能拼成一个边长为5厘米的大正方形．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>