Brenda and nine of her friends want to order a pizza. They decide that each person will eat 2 slices. If each pizza has 4 slices, how many pizzas should they order?
All together, Brenda and her friends make a group of 1 + 9 = 
<gadget id="calculator">1+9</gadget>
<output>10</output>
10 people.
If they each want to eat 2 pizza slices, there should be 10 * 2 = 
<gadget id="calculator">10*2</gadget>
<output>20</output>
20 slices.
Since a pizza has 4 slices, they will have to order 20/4 = 
<gadget id="calculator">20/4</gadget>
<output>5</output>
5 pizzas.

<result>5</result>