A faster method is to each digit in base 4 to two digits in base 2 3 base4 = 11 base2 1 base4 = 01 base2 0 base4 = 00 base2 2 base4 = 10 base2 So 3102 base4 = 11010010 base2
If you wanted to convert base 4 to (say) base 5 you would need the first method and convert to base 10 first