Robin has 28 packages of gum and 13 packages of candy. There are 4 pieces in each package. How many pieces of gum does Robin have?
Robin has 28 packages of gum and 13 packages of candy. There are 4 pieces in each package. 

We need to find the total number of pieces of gum that Robin has. 

We can multiply 28 by 4 to find the total number of pieces of gum in all 28 packages. 

28 multiplied by 4 is the same as 28 x 4, which is 112. 

Therefore, Robin has 112 pieces of gum.