Gretchen is baking pies. She need 2/5 cup of butter for each pie. One stick of butter is 1/5 cup. How many sticks of butter does Gretchen need to make 6 pies?

Gretchen would need 12 sticks of butter

Step-by-step explanation:

because each stick of butter is half of what she needs to make one pie, therefore you multiply 1 x 2 and get 2 and then multiply 2 x 6 and get 12