The GCD of given numbers is 72.
Step 1 :
Divide $ 982800 $ by $ 72 $ and get the remainder
The remainder is zero => GCD is the last divisor $ \color{blue}{ \boxed { 72 }} $.
We can summarize an algorithm into a following table.
| 982800 | : | 72 | = | 13650 | remainder ( 0 ) |
| GCD = 72 | |||||
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.