Here is a cool trick. It's kind of confusing so sorry if this is hard to understand.
Take all the significant figures and subtract them by the non-repeating digits (don't include decimals).
14583 - 1458 = 13125
Now count the number of digits in the result and subtract by the number of digits in the decimal that are before the decimal point. 1.458<span>3̅ has one digit so 5-1 = 4.
Now we want a number that starts with 9 and the rest is zeros. It should be 4 digits long because of the prior calculation. So 9000.