Please help! Cheesecake recipe calls for 350 degrees but my oven only goes to 250!?

[starzzz]

Here is the cheescake recipe if you want to look at it:
http://allrecipes.com/Recipe/Easy-PHILLY-OREO-Cheesecake/Detail.aspx

However, my oven only goes to 250 degress farhenheit and I dont know what Im going to do.
I read another recipe online and it said that a cheescake should be baked at 250 degress for 3 hours? IS that right?