To multiply a mixed number by a fraction, you must convert the mixed number to an improper fraction, then multiply the proper fractions.
Example 1. Find the value of the expression 
Convert the mixed number 
into an improper fraction. After translation, the number will become a fraction of 
. Then we can multiply that fraction by 
Let's say there is one whole pizza and a half pizza:
To multiply these pieces by is to take two-thirds of them. To take two-thirds of them, first divide them into three equal parts. Split in half the pizza on the left. Then we have three equal slices:
Now if we take (two slices of the three available), we get one whole pizza. For clarity, let's paint over the two slices:
Therefore, the value of the expression was 1
2. If you find an error or inaccuracy, please describe it.
3. Positive feedback is welcome.