What happens to the force between two charges if the magnitude of both charges is doubled and the distance between them is double?

If the magnitude of both charges is doubled and the distance between them is also doubled, the force between them will remain the same. This is because the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Doubling both charges and distance cancels each other out in terms of force.