Step-by-step reasoning process: If he grows 9 plants with 3 seed packets, he grows 9 / 3 = 3 plants with 1 seed packet. Since 1 seed packet grows 3 plants, he'll need 1 more to make the plants 12.
The question and answer:
Question and answer: Carter grew 9 plants with 3 seed packets. How many more seed packets does Carter need to have a total of 12 plants in his backyard?
The answer is 1

Step-by-step reasoning process: At first, the children have 10 * 7 = 70 books. With their teacher, they have 70 + 8 = 78 books.
The question and answer:
Question and answer: In a classroom, 10 children have 7 books each. Their teacher brings another 8 books to the classroom. How many books are in the classroom altogether?
The answer is 78

Step-by-step reasoning process: Arnel shared 5 x 8 = 40 pencils with his friends. So, he had 10 + 40 = 50 pencils in all. Therefore, each box had 50 / 10 = 5 pencils inside.
The question and answer:
Question and answer:
Arnel had ten boxes of pencils with the same number of pencils in each box. He kept ten pencils and shared the remaining pencils equally with his five friends. If his friends got eight pencils each, how many pencils are in each box?
The answer is 5