778000000 km to au conversion result above is displayed in three different forms: as a decimal (which could be rounded), in scientific notation (scientific form, standard index form or standard form in the United Kingdom) and as a fraction (exact result). Every display form has its own advantages and in different situations particular form is more convenient than another. For example usage of scientific notation when working with big numbers is recommended due to easier reading and comprehension. Usage of fractions is recommended when more precision is needed.
If we want to calculate how many Astronomical Units are 778000000 Kilometers we have to multiply 778000000 by 10 and divide the product by 1495978707. So for 778000000 we have: (778000000 × 10) ÷ 1495978707 = 7780000000 ÷ 1495978707 = 5.2006087811249 Astronomical Units
So finally 778000000 km = 5.2006087811249 au