[Question]: Martha has 20 apples. She decided to split them among her friends. Jane got 5 apples from her, and James got 2 more than Jane. How many more apples would Martha need to give away to be left with only 4 of them?
[Answer]: Martha gave James 5 + 2 = 7 apples. So Martha was left with 20 - 5 - 7 = 8 apples. To be left with only 4 apples, Martha would need to give away 8 - 4 = 4 more apples.
So the answer is 4.

[Question]: Delores has $450. She buys a computer for $400 and a printer for $40. How much money, in dollars, does Delores have left?
[Answer]: The computer and printer cost 400 + 40 = 440 dollars. Delores has 450 - 440 = 10 dollars left.
So the answer is 10.

[Question]: Mark can jump 6 inches off the ground. Lisa can jump double the height as Mark, and Jacob can jump double the height of Lisa. If James jumps 2/3 as high Jacob, how high can James jump?
[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
Lisa can jump 6 * 2 = 12 inches. Jacob can jump 12 * 2 = 24 inches. James can jump 24 * (2 / 3) = 16 inches high.
So the answer is 16.