The stormtroopers were not the clones?
For a while they were...in more ways than one.
In-universe, the clones were phased out pretty fast and replaced by conscripts.
In the real world, in the period after the prequels were released the official word from LF was that the Stortroopers were indeed clones made from several new template donors after the Clone Wars. However, when they were making The Clone Wars, they started to take note of how attached to the clones the younger viewers became and, that it was felt it would be too upsetting and confusing for them to see "good guy clones" murdering rebel troops 3 mins into ANH, they they decided to adopt the current notion; that the clones got phased out and the Stormtroopers are just ordinary humans.
It never really made sense to me that the Empire stopped using clones after the Clone Wars. Jango Fett wasn't the only badass warrior in the galaxy, and clones are far easier to program and control than conscripted soldiers. Not to mention a neverending army of clones fits right in with the Empire's strategy of overwhelming your enemy with numbers.
Breeding clones to maturity costs money. Lots and lots of money. Regular humans generally take care of that all by themselves before they show up at the recruiting office.
The galaxy is full of *trillions* of beings. You don't need clones to get effectively endless numbers. There's no shortage of dirt poor, ignorant, uneducated nobodies stuck on nowhere dustballs in the outer rim, to whom the idea of being a Stormtrooper seems like a pretty sweet deal. What with the roof over your head, guaranteed food every day, they let you shoot at people from time to time.
The Clones were made to fight a war, so they had to be proficient at what they did. That kind of training is costly. They also needed to be well equipped. Even more costly!
Now, the war is over, so why go to the trouble of continuing to create and maintain legions and legions of elite cloned soldiers when all they're going to be facing is local militias, pirates, raiders, native primitives, uncooperative factory workers and a scattering of separatist holdouts?
Better to just stuff a bunch of disposable idiots into the cheapest composite riot armor prison labour can fabricate, shove the lowest budget light blaster rifle BlasTech sells into their hands, give them just enough training to know how to march in a straight line, follow a mouse droid and which end of the blaster makes the loud noise, then just point them in the vague direction of the enemy and kick them out of the drop ship.