We divide 870550 by 12
We're looking to find how many times 12 goes into 870550.

Let's proceed to step 1:
12 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 12

Going ahead to step 2:
12 can be fit into 87 7 times, resulting in a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 84 away from 87, we end up with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 12

Going ahead to step 3:
12 goes into 30 2 times with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 72.0
If we subtract 24 from 30, we get 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 12

Going ahead to step 4:
12 can be fit into 65 5 times, resulting in a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 725.0
The remainder is 5 after subtracting 60 from 65.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 12

Moving on to step 5:
If we divide 55 by 12, we get 4 and a remainder of 7.
The next digit of our result is 4. 
Result so far: 7254.0
Deduct 48 from 55 and we're left with 7.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 12

Moving on to step 6:
12 goes into 70 5 times with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 72545.0
Subtracting 60 from 70 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.

Let's proceed to step 7:
The number 12 fits into 100 8 times, leaving a remainder of 4.
The next digit of our result is 8. 
Result so far: 72545.8
The remainder is 4 after subtracting 96 from 100.
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 8:
12 goes into 40 3 times with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 72545.83
Subtracting 36 from 40 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.

Going ahead to step 9:
If we divide 40 by 12, we get 3 and a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 72545.833
Subtract 36 from 40 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.

The quotient of the division is 72545.833, and the remainder is 0.0004.