In how many ways 6 rings of different types can be worn in 4 fingers?

Given:6 rings and 4 fingers.

Each ring has 4 different fingers that they can be worn.

So total number of ways in which 6 rings of different types can be worn in 4 fingers $=4 x$ $4 \times 4 \times 4 \times 4 \times 4=4^{6}$