This is a test of commonsense. Complete the next sentence:

How to fix a tangled bike chain
Slide the chain onto the smallest sprockets.
Sprockets are the metal plates with teeth that move the chain. Since you won't be able to ride the bike, you'll have to move the sprockets manually.
To do this, simply lift the chain and move it to the smallest sprocket. Do this on both the rear and front chain sets.