Cut a rectangular piece of paper with a length of 16 cm and a width of 4 cm into small circles with a diameter of 4 cm. How many pieces can be cut at most?
把一张长16厘米，宽4厘米的长方形纸片，剪成直径是4厘米的小圆片，最多可以剪多少个．
<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">4 / 4</gadget>
<output>1</output>

<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<result>4</result>