Find Current in a Solenoid Given Magnetic Field and Velocity

1. The problem statement, all variables and given/known data
An electron circles at a speed of 8510 m/s in a
radius of 2.42 cm in a solenoid. The magnetic
field of the solenoid is perpendicular to the
plane of the electron’s path. Find the current in the solenoid if it has
23.3 turns/cm.
Answer in units of mA

2. Relevant equations
I think you can use B=uIN
I=B/(uN)
u is the universal vacuum permittivity constant, n is the number of turns

3. The attempt at a solution
I already calculated force to be 2e-6.
There are 56.386 turns total because 23.3*2.42
so I got 2e-6/(4pi*10^-7*56.386)=0.02822
so 28.22 mA
I punched this in and it was wrong.
Did I do something weird?

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