How to use Overpass Api for specific BoundingBox

I am trying to get parks from specific area through Overpass API. The Query is like -

[out:json][timeout:25];
(
  node["leisure"="park"]({{bbox}});
  way["leisure"="park"]({{bbox}});
  relation["leisure"="park"]({{bbox}});
);

out body;
>;
out skel qt;

How can I replace bbox with certain specific BoundingBox like '50.6,7.0,50.8,7.3' ?

Any help would be appreciated.