Ricardo picked 3 1/2 pints of strawberries and used 4/5 of them to make jam. How many pints of strawberries did he use for the jam? Write the answer as a mixed number in simplest form.

To find the amount of strawberries used for jam, we need to multiply the total amount of strawberries picked by the fraction used for jam: 3 1/2 pints * 4/5 = <<3 1/2*4/5=2 4/5>>2 4/5 pints. Answer: \boxed{2\frac{4}{5}}.