Let's divide 85102015 by 12
We want to divide 85102015 by 12.

Advancing to step 1:
The number 12 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 12

Let's proceed to step 2:
The number 12 fits into 85 7 times, leaving a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 84 away from 85, we end up with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 12

Going ahead to step 3:
12 can be fit into 11 0 times, resulting in a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 70.0
If we subtract 0 from 11, we get 11.
Take the next digit (0) from the dividend and append it to 11, then repeat: 110 / 12

On to step 4:
12 can be fit into 110 9 times, resulting in a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 709.0
The remainder is 2 after subtracting 108 from 110.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 12

Let's proceed to step 5:
12 goes into 22 1 times with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 7091.0
Deduct 12 from 22 and we're left with 10.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 12

Let's proceed to step 6:
If we divide 100 by 12, we get 8 and a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 70918.0
Subtract 96 from 100 to get 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 12

Let's proceed to step 7:
12 can be fit into 41 3 times, resulting in a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 709183.0
Deduct 36 from 41 and we're left with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 12

On to step 8:
55 divided by 12 is 4 with a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 7091834.0
If we take 48 away from 55, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
If we divide 70 by 12, we get 5 and a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 7091834.5
The remainder is 10 after subtracting 60 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
12 goes into 100 8 times with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 7091834.58
Subtract 96 from 100 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
12 can be fit into 40 3 times, resulting in a remainder of 4.
The next digit of our result is 3. 
Result so far: 7091834.583
If we take 36 away from 40, we end up 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.

Let's proceed to step 12:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 7091834.5833
If we take 36 away from 40, we end up 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.

After the division, we end up with 7091834.5833 and a remainder of 4e-05.