A small problem: What is 3 ½ divided by ¼?
A group of students have 3 ½
small pizzas. A small pizza is
divided in 4 pieces.  How many
students can have a piece?
Each pie can serve 4 students,
so the 3 pies can serve 12.
The remaining ½ can serve 2,
so a total of 14 can be served.
20