Suppose you toss a coin and will win 3 if it comes up heads

Last updated: 7/3/2023

Suppose you toss a coin and will win 3 if it comes up heads If it comes up tails you toss again This time you will receive 6 if it comes up heads If it comes up tails toss again This time you will receive 12 if it is heads and nothing if it comes up tails What is the mathematical expectation for this game