Seek the greatest common divisor of two numbers

In esProc, compute the greatest common divisor of any two numbers.

Solution:

A B C
1 12345678 765432
2 >small=A1 >big=B1
3 if small>big >small=B1
4   >big=A1
5 for small>0 =big%small
6   >big=small
7   >small=B5
8 =big  

The result of A8 is shown below: