>>> import math
>>> math.gcd(9, 12)
3
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import math
print("Res =",math.gcd(2, 1))
#Res = 1
import math
#math.gcd(*integers)
math.gcd(3, 9)
math.gcd(2, 3, 9)
math.gcd(2, 3, 4, 12, ...)
import math
math.gcd(2, 4) // returns 2