Fraction and whole number division in contexts

$4$‍ friends are running in a relay race. The race is ${\displaystyle \frac{1}{3}}\text{ km}$‍ long. How many kilometers will each friend run?

Erica has ${\displaystyle \frac{1}{3}}$‍ bag of candy. For her birthday, she receives $4$‍ more bags of candy. How much candy does Erica have in total?

The local ice cream shop is opening for the summer. They have $4$‍ liters of milk. Each liter of milk needs ${\displaystyle \frac{1}{3}}$‍ bag of ice cream mix. How many bags of ice cream mix do they need?