What is the expected product of heads and tails if a coin flipped 10 times

What is the expected product of heads and tails if a coin flipped 10 times

What is the expected value of the product of heads and tails of a fair
coin flipped 10 times?
What is the expected product if the coins are biased? P(H)=1/3 P(T)=2/3?
10 flips.