869319 ÷ 12 
Our goal is to divide 869319 by 12.

Going ahead to step 1:
12 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 12

On to step 2:
The number 12 fits into 86 7 times, leaving a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 2 after subtracting 84 from 86.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 12

Step 3:
12 goes into 29 2 times with a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 72.0
The remainder is 5 after subtracting 24 from 29.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 12

Going ahead to step 4:
12 goes into 53 4 times with a remainder of 5.
The next digit of our result is 4. 
Result so far: 724.0
Deduct 48 from 53 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 12

Let's proceed to step 5:
The number 12 fits into 51 4 times, leaving a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 7244.0
Deduct 48 from 51 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 12

Moving on to step 6:
12 goes into 39 3 times with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 72443.0
If we subtract 36 from 39, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
30 divided by 12 is 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 72443.2
Deduct 24 from 30 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
When dividing 60 by 12, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 72443.25
The remainder is 0 after subtracting 60 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
12 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 72443.25
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.

Advancing to step 10:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 72443.25
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.

The final outcome is 72443.25, with a leftover of 0.0.