The value of 6 in 675,002 is 1,000 times greater than the value of 6 in 385,621.
This is a problem with the place value. Let us see what is the relationship in the value of 6 at 675,002 and 385,621 in the unit form.
Those numbers can be rewritten as follows.
675,002 are
385,621 are
So it's quite clear that the value of 6 in 675,002 is 1,000 times greater than the value of 6 in 385,621. Because the place value of 6 in 675,002 is hundred thousands whereas the place value of 6 in 385,621 is hundreds.
Similar with 600,000 = 1,000 x 600, exactly like that.
Keywords: what is the relationship between the 6s, compare, in 675,002 and 385,621, unit form, place value, 100 times greater than, thousands, hundreds, ones