excel function for if outcome =_____ multiplier =...

[Rhyder]

I am trying to find the amount of spinns a wheel would need to do to go 100km and i cant find a sumifoutcome function that would stop me from need ing to do id all by hand

[#2]

@Rhyder 

If you know that the circumference if the wheel is n metres, it would be

=100*1000/n

If you know that the radius of the wheel is n metres, it would be

=100*1000/(2*PI()*n)