Explanation:
you mean 4 thousandths ?
0.004
if you truly mean 4 thousands, then that is
4000
in a number like
123456789.987654321
the digits left of the decimal point represent positive powers of 10 starting with
10⁰ = 1 the singles. the 9 really is 9.
10¹ = 10 the tens. the 8 means 80.
10² = 100 the hundreds. the 7 means 700.
10³ = 1000 the thousands. the 6 means 6,000.
10⁴ = 10000 the ten-thousands. the 5 means 50,000.
10⁵ ... the hundred-thousands. the 4 means 400,000.
10⁶ ... the millions. the 3 means 3,000,000.
10⁷ ... the tens of millions. the 2 means 20,000,000.
10⁸ ... the hundreds of millions. 100,000,000
10⁹ ... billions (in English). milliards e.g. in German. 1,000,000,000
...
the digits right of the decimal point represent negative powers of 10 (that means they stand for 1/...).
10^-1 = 0.1 the tenths. the 9 is 0.9
10^-2 = 0.01 the hundredths. the 8 is 0.08.
10^-3 = 0.001 the thousandths. the 7 is 0.007.
10^-4 = 0.0001 the ten-thousandths. the 6 is 0.0006.
10^-5 = ... the hundred-thousandths. the 5 is 0.00005.
10^-6 = ... the millionths. the 4 is 0.000004.
10^-7 = ... the ten-millionths. the 3 is 0.0000003.
10^-8 = ... the hundred-millionths. 0.00000002.
10^-9 = ... the billionths. 0.000000001
...