In this module, you can study how to divide and multiply mixed numbers.
When multiplying with fractions, you can often replace the multiplication sign with the word "of". For example, "1/3 x 1/3" means the same thing as "1/3 of 1/3".
3 divided by 1/4 means "how many times does 1/4 go into 3?" The answer is 12.
Practice and study
Use these search terms to find your own resources:
divide fraction and mixed number
divide fraction and mixed fraction