A store sells beer, and it is stipulated that every 5 empty beer bottles can be exchanged for 1 bottle of beer. Uncle Zhang’s family bought 80 bottles of beer, and after drinking them, they exchanged the empty beer bottles for beer according to regulations. How many bottles of beer can their family drink in total?
某商店出售啤酒，规定每5个空啤酒瓶能换1瓶啤酒．张叔叔家买了80瓶啤酒，喝完后再按规定用空啤酒瓶去换啤酒，他们家前后共能喝到多少瓶啤酒．
<gadget id="calculator">80 + 16 + 3 + 1</gadget>
<output>100</output>

<result>100</result>