125389 ÷ 31 
We're looking to find how many times 31 goes into 125389.

Going ahead to step 1:
The number 31 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 31

Going ahead to step 2:
31 goes into 12 0 times with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 31

Moving on to step 3:
125 divided by 31 is 4 with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 124 from 125 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 31

Step 4:
The number 31 fits into 13 0 times, leaving a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 31

Advancing to step 5:
31 can be fit into 138 4 times, resulting in a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 404.0
If we take 124 away from 138, we end up with 14.
Fetch the next digit (9) from the dividend, attach it to 14 and continue: 149 / 31

Going ahead to step 6:
149 divided by 31 is 4 with a remainder of 25.
Put 4 as the next digit of the answer. 
Result so far: 4044.0
If we subtract 124 from 149, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 7:
250 divided by 31 is 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 4044.8
Deduct 248 from 250 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
If we divide 20 by 31, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 4044.8
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
If we divide 200 by 31, we get 6 and a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 4044.806
Subtract 186 from 200 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 10:
140 divided by 31 is 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 4044.8064
If we take 124 away from 140, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
31 goes into 160 5 times with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 4044.80645
Subtracting 155 from 160 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 12:
When dividing 50 by 31, we get 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 4044.806451
If we subtract 31 from 50, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 13:
When dividing 190 by 31, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 4044.8064516
Subtracting 186 from 190 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 14:
If we divide 40 by 31, we get 1 and a remainder of 9.
The next digit of our result is 1. 
Result so far: 4044.80645161
If we take 31 away from 40, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 4044.80645161 with a remaining 9e-09.