We're dividing 39886215 by 859 
We want to divide 39886215 by 859.

Step 1:
If we divide 3 by 859, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 859

Going ahead to step 2:
When dividing 39 by 859, we get 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Take the next digit (8) from the dividend and append it to 39, then repeat: 398 / 859

Advancing to step 3:
If we divide 398 by 859, we get 0 and a remainder of 398.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 398 to get 398.
Fetch the next digit (8) from the dividend, attach it to 398 and continue: 3988 / 859

Moving on to step 4:
If we divide 3988 by 859, we get 4 and a remainder of 552.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 3436 away from 3988, we end up with 552.
Take the next digit (6) from the dividend and append it to 552, then repeat: 5526 / 859

On to step 5:
859 can be fit into 5526 6 times, resulting in a remainder of 372.
Write down 6 as next digit of the result. 
Result so far: 46.0
If we subtract 5154 from 5526, we get 372.
Append the next digit (2) from the dividend to 372 and continue with: 3722 / 859

Advancing to step 6:
If we divide 3722 by 859, we get 4 and a remainder of 286.
Record the quotient 4 as the next digit in the result. 
Result so far: 464.0
Subtract 3436 from 3722 to get 286.
Grab the next digit (1) from the dividend, add it to 286, then carry on: 2861 / 859

Moving on to step 7:
If we divide 2861 by 859, we get 3 and a remainder of 284.
The number 3 becomes the next digit in our result. 
Result so far: 4643.0
Deduct 2577 from 2861 and we're left with 284.
Include the next digit (5) from the dividend after 284, then repeat: 2845 / 859

Let's proceed to step 8:
2845 divided by 859 is 3 with a remainder of 268.
Use 3 as the next digit of our solution. 
Result so far: 46433.0
Subtracting 2577 from 2845 leaves us with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Advancing to step 9:
When dividing 2680 by 859, we get 3 with a remainder of 103.
Write down 3 as next digit of the result. 
Result so far: 46433.3
Subtract 2577 from 2680 to get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Advancing to step 10:
When dividing 1030 by 859, we get 1 with a remainder of 171.
Write down 1 as next digit of the result. 
Result so far: 46433.31
Subtracting 859 from 1030 leaves us with 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Let's proceed to step 11:
When dividing 1710 by 859, we get 1 with a remainder of 851.
Record the quotient 1 as the next digit in the result. 
Result so far: 46433.311
If we take 859 away from 1710, we end up with 851.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8510, and continue the process.

The quotient of the division is 46433.311, and the remainder is 0.0851.