c)

Did you know that the multiplication of decimals can be traced back to ancient civilizations? The Babylonians, who flourished around 2000 B.C., were among the first to use a base-60 number system and had a way of dealing with fractions that paved the way for our modern understanding of decimal multiplication!

Now, when you multiply , just treat it like whole numbers at first: . But don’t forget to place the decimal back! Since there’s two digits behind the decimal in 0.82, you’ll move the decimal two places to the left, giving you a final answer of or simply . Easy peasy!