Question: Jennie makes quilts. She can make 7 quilts with 21 yards of material. How many yards of material would be required to make 12 quilts?
Answer: The amount of material that Jennie needs per quilts is 21 yards / 7 quilts = 3 yards per quilt. In order to make 12 quilts, Jennie will need 12 quilts * 3 yards = 36 yards. The answer is 36.
[Question]Today, at the school science lesson, Jake learned that there are 8 more solar systems for every planet in the galaxy. If there are 20 planets in the galaxy, how many solar systems and planets are there altogether?
[Answer]If there are 8 more solar systems for every planet in the galaxy, there are 8 + 1 = 9 solar systems for every planet. Since the number of planets is 20, there are 20 * 9 = 180 solar systems in the galaxy. Altogether, there are 180 + 20 = 200 solar systems and planets in the galaxy. The answer is 200.
Q: Mother made 2 dozen brownies and placed them on the kitchen counter to cool. Father smelled the brownies, came into the kitchen and ate 8 of them. Then, their daughter, Mooney, wandered into the kitchen and ate 4 of the brownies. The next morning, Mother made another two dozen brownies and added them to those remaining from the day before. After that, how many brownies were on the counter?
A: Two dozen brownies is 2 * 12 = 24 brownies. After Father ate his 8, there were 24 - 8 = 16 brownies remaining on the counter. After Mooney ate her 4, there were 16 - 4 = 12 brownies remaining on the counter. Mother made a second batch of two - dozen brownies, or 2 * 12 = 24 brownies. After Mother added the second two - dozen, there were 12 + 24 = 36 brownies on the kitchen counter. The answer is 36.
Question: Ethyl bought Lucy two new dolls for her doll collection. This increased the doll collection by 25%. After the addition of the two new dolls, how many dolls are in Lucy's collection?
Answer: Let's let "x" be the original number of dolls in Lucy's doll collection. Then, 2 dolls equals an increase of 25%, and this can be written as x * 0.25 = 2. Solving for x we get x = 2 / 0.25 = 8 dolls in Lucy's original collection. After the gift of two new dolls, Lucy's collection contains 8 + 2 = 10 dolls. The answer is 10.
[Question]Six bottles of 2 liters of water cost $12. What is the price of 1 liter of water?
[Answer]Each bottle of 2 liters of water costs $12 / 6 = $2. So the cost of 1 liter of water is $2 / 2 = $1. The answer is 1.
[Question]Peter knows that the distance an airplane travels between Spain and Russia is 7019 km, while the distance between Spain and Germany is 1615 km. Peter took a flight from Spain, which made a stopover in Germany, while being there, he receives a call from his brother asking him how many kilometers he has to fly to get to Russia and then return to Spain. What will Peter answer?
[Answer]

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Being 7019 km the distance from Spain to Russia. To get from Germany to Russia, Peter has to travel 7019 - 1615 = 5404 km. Knowing both distances, Peter will answer that he has to fly 5404 + 7019 = 12423 km. The answer is 12423.