We look at the division of 871603 by 8 
Our goal is to divide 871603 by 8.

On to step 1:
8 can be fit into 8 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 8 from 8 to get 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 8

Step 2:
8 can be fit into 7 0 times, resulting in a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 7, we get 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 8

Advancing to step 3:
8 goes into 71 8 times with a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 108.0
Deduct 64 from 71 and we're left with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 8

Advancing to step 4:
8 can be fit into 76 9 times, resulting in a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 1089.0
If we subtract 72 from 76, we get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 8

Going ahead to step 5:
8 can be fit into 40 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 10895.0
The remainder is 0 after subtracting 40 from 40.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 8

Let's proceed to step 6:
8 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 108950.0
Subtract 0 from 3 to 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.

Going ahead to step 7:
When dividing 30 by 8, we get 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 108950.3
Subtracting 24 from 30 leaves us 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.

On to step 8:
If we divide 60 by 8, we get 7 and a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 108950.37
If we subtract 56 from 60, we 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.

Let's proceed to step 9:
8 goes into 40 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 108950.375
Subtracting 40 from 40 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.

Let's proceed to step 10:
When dividing 0 by 8, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 108950.375
The remainder is 0 after subtracting 0 from 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 11:
The number 8 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 108950.375
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.

After the division, we end up with 108950.375 and a remainder of 0.0.