The daughter product of aluminum-26 is magnesium-26. Given the half-life of aluminum-26 of 0.74 million years, how much time would have passed to

The daughter product of aluminum-26 is magnesium-26. Given the half-life of aluminum-26 of 0.74 million years, how much time would have passed to have only 1⁄8 of the initial radioactivity remaining? Express your answer in millions of years.