15666869 divided by 31 
We're looking to find how many times 31 goes into 15666869.

Let's proceed to step 1:
31 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 31

Moving on to step 2:
When dividing 15 by 31, we get 0 with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Bring next digit (6) of the dividend behind the 15 and repeat the process: 156 / 31

Going ahead to step 3:
The number 31 fits into 156 5 times, leaving a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 155 from 156 leaves us with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 31

Step 4:
When dividing 16 by 31, we get 0 with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 50.0
Deduct 0 from 16 and we're left with 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 31

Let's proceed to step 5:
If we divide 166 by 31, we get 5 and a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 505.0
Subtract 155 from 166 to get 11.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 31

Step 6:
31 can be fit into 118 3 times, resulting in a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 5053.0
If we subtract 93 from 118, we get 25.
Fetch the next digit (6) from the dividend, attach it to 25 and continue: 256 / 31

On to step 7:
31 goes into 256 8 times with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 50538.0
Deduct 248 from 256 and we're left with 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 31

Step 8:
31 can be fit into 89 2 times, resulting in a remainder of 27.
The number 2 becomes the next digit in our result. 
Result so far: 505382.0
If we subtract 62 from 89, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 9:
31 goes into 270 8 times with a remainder of 22.
The next digit of our result is 8. 
Result so far: 505382.8
The remainder is 22 after subtracting 248 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 10:
31 goes into 220 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 505382.87
Deduct 217 from 220 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 11:
When dividing 30 by 31, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 505382.87
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 12:
If we divide 300 by 31, we get 9 and a remainder of 21.
The next digit of our result is 9. 
Result so far: 505382.8709
If we subtract 279 from 300, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 13:
210 divided by 31 is 6 with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 505382.87096
Subtracting 186 from 210 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 14:
When dividing 240 by 31, we get 7 with a remainder of 23.
The next digit of our result is 7. 
Result so far: 505382.870967
Subtract 217 from 240 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 15:
When dividing 230 by 31, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 505382.8709677
The remainder is 13 after subtracting 217 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final outcome is 505382.8709677, with a leftover of 1.3e-07.