We divide 149971 by 90
We want to figure out the number of times 149971 can be divided by 90.

Step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 90

Advancing to step 2:
90 can be fit into 14 0 times, resulting in a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 14, we get 14.
Bring next digit (9) of the dividend behind the 14 and repeat the process: 149 / 90

Let's proceed to step 3:
90 goes into 149 1 times with a remainder of 59.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 90 away from 149, we end up with 59.
Include the next digit (9) from the dividend after 59, then repeat: 599 / 90

On to step 4:
The number 90 fits into 599 6 times, leaving a remainder of 59.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
The remainder is 59 after subtracting 540 from 599.
Fetch the next digit (7) from the dividend, attach it to 59 and continue: 597 / 90

On to step 5:
90 goes into 597 6 times with a remainder of 57.
Write down 6 as next digit of the result. 
Result so far: 166.0
If we subtract 540 from 597, we get 57.
Fetch the next digit (1) from the dividend, attach it to 57 and continue: 571 / 90

Moving on to step 6:
The number 90 fits into 571 6 times, leaving a remainder of 31.
Write down 6 as next digit of the result. 
Result so far: 1666.0
Subtracting 540 from 571 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 7:
If we divide 310 by 90, we get 3 and a remainder of 40.
The next digit of our result is 3. 
Result so far: 1666.3
If we take 270 away from 310, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
The number 90 fits into 400 4 times, leaving a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 1666.34
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
400 divided by 90 is 4 with a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 1666.344
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 1666.344 with a remainder of 0.004.