I told one of my elderly neighbours I would install a toilet into her livingroom? As she can no longer get upstairs well. I have a focal...

As she can no longer get upstairs well. I have a focal problem the pipes for the toilet are round and the gutter downfall ones are square how do I join them.
Answers:    Tw@t stick to the stage your a biddable comedian but a crap plumber ( pun intended !! )
huh?? you cant join it into the gutter you d!ck I hope this is a banter its funny if it aint!!! haha muppet!