The total number of oranges in all the trees before Dulce picked any is 8 trees * 200 oranges/tree = <<8*200=1600>>1600 oranges.

If each orange tree has 200 oranges, and Dulce picks 2/5 of each tree's oranges, she picks 2/5 * 200 oranges = <<2/5*200=80>>80 oranges.

Since the total number of orange trees is eight, Dulce picked 8 trees * 80 oranges/tree = <<8*80=640>>640 oranges from all the trees.

After picking 640 oranges from the trees, the total number of oranges remaining became 1600 oranges - 640 oranges = 960 oranges.

# Answer

960
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Dulce's father has eight orange trees on his farm. If each tree has 200 fruits and Dulce picks 2/5 of the oranges from each tree, calculate the total number of fruits remaining in all the trees.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
960
Dulce's father has eight orange trees on his farm. If each tree has 200 fruits and Dulce picks 2/5 of the oranges from each tree, calculate the total number of fruits remaining in all the trees.
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