129149 divided by 90 
We're looking to find how many times 90 goes into 129149.

Going ahead to step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 90

Going ahead to step 2:
12 divided by 90 is 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 90

Advancing to step 3:
129 divided by 90 is 1 with a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 90 from 129, we get 39.
Take the next digit (1) from the dividend and append it to 39, then repeat: 391 / 90

Step 4:
When dividing 391 by 90, we get 4 with a remainder of 31.
Write down 4 as next digit of the result. 
Result so far: 14.0
Subtracting 360 from 391 leaves us with 31.
Take the next digit (4) from the dividend and append it to 31, then repeat: 314 / 90

Advancing to step 5:
90 can be fit into 314 3 times, resulting in a remainder of 44.
Put 3 as the next digit of the answer. 
Result so far: 143.0
If we take 270 away from 314, we end up with 44.
Include the next digit (9) from the dividend after 44, then repeat: 449 / 90

Step 6:
When dividing 449 by 90, we get 4 with a remainder of 89.
Put 4 as the next digit of the answer. 
Result so far: 1434.0
The remainder is 89 after subtracting 360 from 449.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 7:
890 divided by 90 is 9 with a remainder of 80.
Write down 9 as next digit of the result. 
Result so far: 1434.9
Subtract 810 from 890 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 8:
800 divided by 90 is 8 with a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 1434.98
The remainder is 80 after subtracting 720 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 9:
When dividing 800 by 90, we get 8 with a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 1434.988
Deduct 720 from 800 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Our division results in 1434.988 with a remaining 0.008.