We look at the division of 15901111 by 28 
Let's see how many times 28 fits into 15901111.

Going ahead to step 1:
The number 28 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 28

Advancing to step 2:
28 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 28

Let's proceed to step 3:
28 can be fit into 159 5 times, resulting in a remainder of 19.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 140 from 159 to get 19.
Take the next digit (0) from the dividend and append it to 19, then repeat: 190 / 28

Moving on to step 4:
28 can be fit into 190 6 times, resulting in a remainder of 22.
The next digit of our result is 6. 
Result so far: 56.0
If we take 168 away from 190, we end up with 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 28

Advancing to step 5:
28 goes into 221 7 times with a remainder of 25.
Use 7 as the next digit of our solution. 
Result so far: 567.0
If we take 196 away from 221, we end up with 25.
Fetch the next digit (1) from the dividend, attach it to 25 and continue: 251 / 28

Going ahead to step 6:
The number 28 fits into 251 8 times, leaving a remainder of 27.
Write down 8 as next digit of the result. 
Result so far: 5678.0
Deduct 224 from 251 and we're left with 27.
Append the next digit (1) from the dividend to 27 and continue with: 271 / 28

Let's proceed to step 7:
When dividing 271 by 28, we get 9 with a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 56789.0
Deduct 252 from 271 and we're left with 19.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 28

Let's proceed to step 8:
28 can be fit into 191 6 times, resulting in a remainder of 23.
The next digit of our result is 6. 
Result so far: 567896.0
If we take 168 away from 191, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 9:
When dividing 230 by 28, we get 8 with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 567896.8
The remainder is 6 after subtracting 224 from 230.
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 10:
28 goes into 60 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 567896.82
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.

Step 11:
If we divide 40 by 28, we get 1 and a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 567896.821
Deduct 28 from 40 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
If we divide 120 by 28, we get 4 and a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 567896.8214
If we subtract 112 from 120, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 13:
80 divided by 28 is 2 with a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 567896.82142
Subtract 56 from 80 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 14:
If we divide 240 by 28, we get 8 and a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 567896.821428
If we take 224 away from 240, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 15:
28 goes into 160 5 times with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 567896.8214285
The remainder is 20 after subtracting 140 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 16:
28 goes into 200 7 times with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 567896.82142857
Subtracting 196 from 200 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.

The final result is 567896.82142857 with a remainder of 4e-09.