How to split Order line item based on Whole Qty or Display pack?

Hello all

I have the below scenario. The Customer Order 75Qty of Material M1.

Now, the Business wants to split the line automatically into 2.

ie M1 - 50Qty

M1 - 25Qty.

Since 50 Qty = one Display Case the business is eager to sell it rather than 50 lose quantity from different open packs...

Hope my requirement is clear and kindly let me know your valuable suggestions for achieveing the same.

Thanks