|   | 1 |  initial version  | 
You can use the pyobject method:
sage: b = RealField(200)(5)
sage: bb = (b^x).operands()[0]
sage: bb.pyobject(), type(bb.pyobject()) 
(5.0000000000000000000000000000000000000000000000000000000000, <type 'sage.rings.real_mpfr.RealNumber'>)
 Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
 
                
                Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.