50g

log_x(y)= ln(y)/ln(x)

so yeah, just calculate the logarithm with natural base, and divide it
by the ln(that_other_base)

f_can2003 wrote:
> 
> 
> How can I calculate logarithms with bases other than 10 and natural (ln)?
> Please help...
> Thanx
> Fatih
> 
>