Divide
Incorrect Divide the cake in four parts.
Correct : Divide the cake into four parts.
Note: But a thing may be divided ‘in half’ or ‘in two’.
Incorrect : He divided the apple into half.
Correct : He divided the apple in half.
Incorrect : The money will be equally divided into the three people.
Correct : The money will be equally divided between/among the three people.
Note: When two people are involved, the preposition ‘among’ cannot be used.
Incorrect : 15 divided with 3 is 5.
Correct : 15 divided by 3 is 5.
Incorrect : A low wall divides our garden with theirs.
Correct: A low wall divides our garden from theirs.
