This year’s total production is 5000 * 2 = <<5000*2=10000>>10000 phones.

A quarter of this year’s production is 10000 / 4 = <<10000/4=2500>>2500 phones.

The number of phones left after selling a quarter of the production is 10000 – 2500 = <<10000-2500=7500>>7500 phones.

# Answer

7500
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A phone factory makes twice as many phones as last year. Last year’s production was 5000 phones. If a quarter of this year’s production is sold, how many phones are left in the factory?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
7500
A phone factory makes twice as many phones as last year. Last year’s production was 5000 phones. If a quarter of this year’s production is sold, how many phones are left in the factory?
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