the simplest way is to do as Peter Pedant says: just type "61cm in feet" into Google and you will get an instant answer with no quibbling. Then do a separate one for "457cm in feet".
If you use the link I posted, you can get the answer as soon as you need it rather than taking time to post the figures on here and then hoping for someone to see it and post a reply.
I dont want to answer questions like whats 5 x 6 though, some might but i dont...but I will try to help with crossword puzzles and quizes especially where an explanation is welcomed