A man in order to reduce his weight
walks along the boundary of a rectangular plot every morning. Depending on his
energy level he walks for N rounds on a given day. Given the length L and
breadth B of the rectangular plot along with the number of rounds N, the
program must print the total distance D covered in the morning walk.
Note: Do not worry about the units like
meters or kilometers.
Input
Format:
The first line contains L and B
separated by a space. The second line contains N.
Output
Format:
The first line contains D.
Boundary
Conditions:
1 <= N <= 100 1 <= L, B <=
999999
Example
Input/Output 1:
Input:
10 20
5
Output:
300
Solution:
l,b=[int(i) for i in input().split()]
n=int(input())
print(2*(l+b)*n)