Step: Writing the given numerals as per International numeral system in words
The given numeral is written as per the International numeral system as it has a comma after every three digits from right to left.
In the International System, counting from the right-hand side towards the left-hand side, we have
(1) One’s period = First three digits (700) i.e., hundreds, tens and ones.
(2) Thousand’s period = next three digits (420) i.e., Hundred-thousands, Ten-thousands and Thousands.
(3) Million’s period = next three digits (005) i.e., Hundred-millions, Ten-millions, Million.
While reading a numeral, all the digits in the same period are read together and the name of the period (except ones) is read along with it.
Therefore, 5,420,700 is Five million, four hundred twenty thousand, seven hundred in words.