You can explain any physical law without numbers. In the extreme, you can speak in terms of a purely qualitative answer---e.g. "gravity is a force that exists between any two objects that have mass".
More precisely, but still with no numbers:
"The gravitational force between 2 objects is proportional to the product of the masses, and inversely proportional to the square of the distance between them."
Hopefully, it is obvious that more information allows more to be done.....
Newton tells us that a force on an object causes acceleration. This is mostly useless if we can't say how much acceleration.