Need to math in billions without fractions

** Need to do math in billions, without fractions**.
I’m kinda having a big problem with a “spreadsheet” game where I need to do continuous math in the area of 1×10^(10) which I can’t do with the available data types, currently I found a workaround using vector datatype, but that introduces a **** load of other problems.
As far as I can see, Int64 (or generally all 64 bit datatypes) is and properly won’t be supported in blueprint.
My question to all you clever guys is that, does anybody have a workaround better than vector or something? Or perhaps a “hack/way” to get Int64 into blueprints?
(sorry for spelling errors, I’m using a cellphone and the autocorrect is tripping