The base 16 number 3B9D equal to what base 10 number

15261

3B9D₁₆   

Using the method....multiply by the base, add the next digit, multiply by the base, add the next digit, etc., we have :

3*16 + 11  =  59

59 * 16 + 9  = 953

953 * 16 +  13 = 15261

Very nice!