What is 1256.78x56 im very confused

It's very simple, it's just multiplication but with fractions. You can work this out with one of two ways:

Using decimals

Using decimals is the same thing as normal multiplication, but you move the decimal the number of digits to the right of the decimal. For example, 125678 x 56 equals 7037968, but with the decimal, 1256.78 x 56 = 70379.68

You move the decimal to places to the right because there are two numbers to the right of the decimal in the number that has the decimal, or 1256. 78.

Using fractions

You can convert the decimal to a fraction and multiply from there, but in this case, it is easier to leave it as a decimal. However, 1256.78 as a fraction would be 1256 78/100

This is what i got but you need to move the decimal like ^^ said