129890 divided by 31 
We're looking to find how many times 31 goes into 129890.

Going ahead to step 1:
If we divide 1 by 31, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 31

Advancing to step 2:
If we divide 12 by 31, we get 0 and a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 31

Going ahead to step 3:
31 goes into 129 4 times with a remainder of 5.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 124 away from 129, we end up with 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 31

Advancing to step 4:
58 divided by 31 is 1 with a remainder of 27.
Write down 1 as next digit of the result. 
Result so far: 41.0
Deduct 31 from 58 and we're left with 27.
Append the next digit (9) from the dividend to 27 and continue with: 279 / 31

Going ahead to step 5:
If we divide 279 by 31, we get 9 and a remainder of 0.
The next digit of our result is 9. 
Result so far: 419.0
Subtracting 279 from 279 leaves us with 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 31

Advancing to step 6:
If we divide 0 by 31, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4190.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
31 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4190.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
The number 31 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4190.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 4190.0 with a balance of 0.0.