Well, darling, 2.1 times 3 equals 6.3. It's as simple as that. Math doesn't have to be complicated, honey. Just multiply those numbers and you're good to go.
To calculate 2.1 times 3, you simply multiply the two numbers together. 2.1 times 3 is equal to 6.3. This can be calculated by multiplying 2.1 by 3, resulting in the product of 6.3.