Hello! Look here! There's 1 apple tree behind Dick's house. Dick is near the tree. There are some apples 2 the tree. Dick is looking 3the apples. They are big and red. Dick is hungry. He wants to 4 an apple. Dick isn't tall. He is short. He can't reach(够到) the apples. He puts a 5 under the tree. Can he reach the apples on the box now?6, he can't. He is too7. Here comes Paul. He is Dick's brother. “Hello, Dick,8 do you want to do?”

     “Please help9, Paul. I can't 10 the apples.”

     “Here you are, Dick. One is for you, and one is for me!”

     “Thank you, Paul.”

$\sqrt{{\left(-2015\right)}^2}$=（　　）