well first we need to c in what places the no. 4s are
the 4 in the left is in the thousands place ....in numbers we can white it as 4,000
the 4 to the right is in the millions place .... in numbers we can white it as 4,000,000
so we can say that the one to the right is always greater .... 4 million ....
to find how many times its greater ... we of course need to subtract
4,000,000 - 4,000
= 3,996,000