Let's divide 863170 by 12
Let's see how many times 12 fits into 863170.

Let's proceed to step 1:
When dividing 8 by 12, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 12

Going ahead to step 2:
The number 12 fits into 86 7 times, leaving a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 84 from 86, we get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 12

Going ahead to step 3:
12 can be fit into 23 1 times, resulting in a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 71.0
Subtract 12 from 23 to get 11.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 12

Moving on to step 4:
If we divide 111 by 12, we get 9 and a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 719.0
If we take 108 away from 111, we end up with 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 12

Advancing to step 5:
The number 12 fits into 37 3 times, leaving a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 7193.0
Subtract 36 from 37 to get 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 12

On to step 6:
The number 12 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 71930.0
Subtracting 0 from 10 leaves us with 10.
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 7:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 71930.8
Subtracting 96 from 100 leaves us 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.

Moving on to step 8:
12 goes into 40 3 times with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 71930.83
Deduct 36 from 40 and we're left 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.

Moving on to step 9:
When dividing 40 by 12, we get 3 with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 71930.833
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.

The final result is 71930.833 with a remainder of 0.0004.