doubling a number

[Gribouillis]

For integers, Python int type suffices

>>> number = "23278327809283209832832093822093820938029830398320938209"
>>> str(2 * int(number))
'46556655618566419665664187644187641876059660796641876418'

Using gmpy2's mpz type

>>> number = "23278327809283209832832093822093820938029830398320938209"
>>> from gmpy2 import mpz
>>> double = 2 * mpz(number)
>>> double
mpz(46556655618566419665664187644187641876059660796641876418)
>>> str(double)
'46556655618566419665664187644187641876059660796641876418'
>>> 

Also for real numbers

>>> number = "23278327809283209832832093822093820938029830398320938209.23232332323232323"
>>> import gmpy2
>>> gmpy2.get_context().precision = 500
>>> from gmpy2 import mpfr
>>> double = 2 * mpfr(number)
>>> str(double)
'46556655618566419665664187644187641876059660796641876418.464646646464646460000000000000000000000000000000000000000000000000000000000000000000000000000001'