821373 divided by 12 
Let's see how many times 12 fits into 821373.

On to step 1:
12 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 12

Step 2:
When dividing 82 by 12, we get 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 72 from 82, we get 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 12

Advancing to step 3:
If we divide 101 by 12, we get 8 and a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
Subtract 96 from 101 to get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 12

Moving on to step 4:
12 can be fit into 53 4 times, resulting in a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 684.0
If we take 48 away from 53, we end up with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 12

Step 5:
57 divided by 12 is 4 with a remainder of 9.
Write down 4 as next digit of the result. 
Result so far: 6844.0
Subtracting 48 from 57 leaves us with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 12

Moving on to step 6:
93 divided by 12 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 68447.0
If we subtract 84 from 93, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
When dividing 90 by 12, we get 7 with a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 68447.7
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
If we divide 60 by 12, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 68447.75
Deduct 60 from 60 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.

Going ahead to step 9:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 68447.75
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
If we divide 0 by 12, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 68447.75
If we take 0 away from 0, we end up 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.

After the division, we end up with 68447.75 and a remainder of 0.0.