How many small squares with an area of 4 square centimeters can be cut from a square paper with a side length of 16 cm.
边长为16厘米的正方形纸，可以剪成面积是4平方厘米的小正方形多少个．
<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<result>64</result>