Question: Doc's Pizza contains 6 pieces of pizza. Ten fourth-graders each bought 20 pizzas from Doc's Pizza and put them in their box. How many pieces of pizza are the children carrying in total?
Answer: If Each fourth - grader bought 20 pizzas, with each pizza having 6 pieces, each fourth - grader had a total of 20 * 6 = 120 pieces of pizza in their box. Ten fourth - graders each bought 20 pizzas, and since the 20 pizzas had 120 pieces, the total number of pizzas in the students' boxes is 120 * 10 = 1200 pieces. The answer is 1200.
[Question]James is building an army of Warhammer 40k figurines. It takes him 20 minutes to paint a space marine and 70 minutes to paint a dreadnought. If he paints 6 space marines and 2 dreadnoughts, how long does he spend painting total?
[Answer]First find the total time James spends painting space marines: 20 minutes / marine * 6 marines = 120 minutes. Then find the total time James spends painting dreadnoughts: 70 minutes / dreadnought * 2 dreadnoughts = 140 minutes. Then add the two amounts of time to find the total time James spends painting: 120 minutes + 140 minutes = 260 minutes. The answer is 260.
Q: The total cost of Olivia’s groceries was $42. The bananas cost her $12, the bread cost her $9, and the milk cost her $7. The only other groceries she bought were apples. In dollars, how much money did the apples cost her?
A: The combined cost of the bananas, bread, and milk was 12 + 9 + 7 = $28. The difference between this and the total is the cost of the apples, which must have therefore cost Olivia 42 – 28 = $14. The answer is 14.
Question: Tony, Moses and Esther are to share $50. Moses will take 40% of the total amount while Tony and Esther will split the remainder equally among themselves. How much more than Esther will Moses get?
Answer: 40% of $50 is (40 / 100) * $50 = $20. After Moses takes $20, there will be $50 - $20 = $30 left. Tony and Esther will split $30 equally among themselves so each of them will get $30 / 2 = $15. Moses gets $20 - $15 = $5 more than Esther. The answer is 5.
[Question]Tom attends a party that collects $2000. Half the school attended and the school had 400 people. How much would they have made if 300 people attended?
[Answer]There were 400 / 2 = 200 people in attendance. So that means each person paid 2000 / 200 = $10. So if 300 people attended they would have made 300 * 10 = $3000. The answer is 3000.
[Question]There are 19 students in the 3rd grade and twice that number in the 4th grade. There are 10 boys and 19 girls in the 2nd grade. How many students are there in total?
[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
In the third grade, there are 19 students. In the fourth grade, there are 2 × 19 = 38 students. Counting the boys and girls in the second grade, there are 10 + 19 = 29. There are 19 + 38 + 29 = 86 students in total. The answer is 86.