Arrange flowers around a square flower bed, put 20 pots on each side, and the distance between every two pots is equal. How many potted flowers are placed around the flower bed?
在一个正方形花坛的四周摆花，每边放20盆，每两盆间距离相等．花坛四周一共放了多少盆花？
<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">19 * 4</gadget>
<output>76</output>

<result>76</result>