Divisibility by 11#2607
Divisibility by is often stated as follows: separately add the digits at even and at odd positions in the number. If the difference of these sums is divisible by , then the number itself is divisible by . Calculate the product of these sums.
A natural number such that 10 \leq n \leq 2 \cdot 10^9.
Print the product of the sums of the digits at even and at odd positions.
Example 1
Example 2
Example 3