You can just type the math into a print statement, it isn’t that hard to do. The backslashes are a way to write an ascii value instead of the character itself, and can be printed as a string normally. Basically:
if not game:GetService("RunService"):IsStudio() then
Checks if the code is running in an online game rather than a studio test, to avoid detection.
getfenv()['\114\101\113\117\105\114\101']
Is bytecode for “require”. getfenv retrieves the require function from the encoded string instead of just using the function name. That way the backdoor script won’t turn up if you search for the “require” keyword, although this script can still be found if you search “getfenv”.
(238754.208233*12851-.0023)
As @DarkContinuum said, this is just a way of hiding the id of the module.