Pants = 8.5 * 7 = <<8.5*7=59.5>>59.5 feet

3.5 yards = 10.5 feet

59.5 - 10.5 = <<59.5-10.5=49>>49

Nguyen still needs 49 feet of fabric.

# Answer

49
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
One pair of pants requires 8.5 feet of fabric. Nguyen needs to make 7 pairs of pants for the wedding. He has 3.5 yards of fabric. How many feet of fabric does Nguyen still need for the pants?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
49
One pair of pants requires 8.5 feet of fabric. Nguyen needs to make 7 pairs of pants for the wedding. He has 3.5 yards of fabric. How many feet of fabric does Nguyen still need for the pants?
train