We're dividing 15903693 by 871 
Let's see how many times 871 fits into 15903693.

On to step 1:
871 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 871

Step 2:
The number 871 fits into 15 0 times, leaving a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 871

Let's proceed to step 3:
If we divide 159 by 871, we get 0 and a remainder of 159.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 159, we end up with 159.
Bring next digit (0) of the dividend behind the 159 and repeat the process: 1590 / 871

Moving on to step 4:
1590 divided by 871 is 1 with a remainder of 719.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 871 from 1590 to get 719.
Bring next digit (3) of the dividend behind the 719 and repeat the process: 7193 / 871

Step 5:
7193 divided by 871 is 8 with a remainder of 225.
Write down 8 as next digit of the result. 
Result so far: 18.0
Subtract 6968 from 7193 to get 225.
Include the next digit (6) from the dividend after 225, then repeat: 2256 / 871

On to step 6:
871 can be fit into 2256 2 times, resulting in a remainder of 514.
The next digit of our result is 2. 
Result so far: 182.0
Subtract 1742 from 2256 to get 514.
Take the next digit (9) from the dividend and append it to 514, then repeat: 5149 / 871

Moving on to step 7:
If we divide 5149 by 871, we get 5 and a remainder of 794.
Record the quotient 5 as the next digit in the result. 
Result so far: 1825.0
Subtract 4355 from 5149 to get 794.
Append the next digit (3) from the dividend to 794 and continue with: 7943 / 871

On to step 8:
871 can be fit into 7943 9 times, resulting in a remainder of 104.
Write down 9 as next digit of the result. 
Result so far: 18259.0
Deduct 7839 from 7943 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Going ahead to step 9:
871 can be fit into 1040 1 times, resulting in a remainder of 169.
Record the quotient 1 as the next digit in the result. 
Result so far: 18259.1
The remainder is 169 after subtracting 871 from 1040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

On to step 10:
When dividing 1690 by 871, we get 1 with a remainder of 819.
The next digit of our result is 1. 
Result so far: 18259.11
Subtracting 871 from 1690 leaves us with 819.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8190, and continue the process.

After the division, we end up with 18259.11 and a remainder of 0.819.