Multiply fractions by whole numbers and Mixed Numbers

3 boxes each with 3/8 of a pizza left. How much pizza was left in all?

Lana has 15 books about bugs. $$\frac{2}{3}$$ of these books are about lightning bugs. How many of Lana's bug books are about lightning bugs?

Tina has 5 pounds of rice. She will use $$\frac{3}{5}$$ of it to make fried rice for her family. How much rice will Tina use to make fried rice?

Yanna eats 3/5 of each of the 3 layers of a chocolate cake. How much cake did Yanna eat in all?

Martha wants to make some salad dressing. She has 1/3 cup of vinegar. She wants to make 5 batches of the dressing. How much vinegar will she use in all?

Aiden has 5 bags, each containing $$2\frac{2}{3}$$ kg of apples. How many kilograms of apples does Aiden have in total?

Area of a 4 by $$3\ \frac{1}{2}$$ floor

Marie needs $$2\ \frac{1}{4}$$ yards of fabric. She already has $$1\ \frac{3}{8}$$ yards. How many more yards of fabric does she need?

Victor stacked 6 pieces of wood on top of one another. If each piece was $$\frac{6}{8}$$ of a foot tall, how tall was his pile?

Sally is making pumpkin bread. If her mom tells her to fill up the $$\frac{3}{4}$$ measuring cup 5 times with milk. How much milk is she using?