Evan practices the piano 329 minutes in 1 weeks. Assuming he practices the same amount every week, how many minutes would he practice in 2 weeks?

If Evan practices 329 minutes in 1 week, then he practices 329/1 = <<329/1=329>>329 minutes per week.

Therefore, in 2 weeks, he would practice 329 * 2 = <<329*2=658>>658 minutes. Answer: \boxed{658}.