We're dividing 1561025 by 391 
Our goal is to divide 1561025 by 391.

Going ahead to step 1:
391 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 391

Let's proceed to step 2:
391 can be fit into 15 0 times, resulting in a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Bring next digit (6) of the dividend behind the 15 and repeat the process: 156 / 391

Advancing to step 3:
391 can be fit into 156 0 times, resulting in a remainder of 156.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 156, we end up with 156.
Include the next digit (1) from the dividend after 156, then repeat: 1561 / 391

Moving on to step 4:
If we divide 1561 by 391, we get 3 and a remainder of 388.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 1173 from 1561, we get 388.
Include the next digit (0) from the dividend after 388, then repeat: 3880 / 391

Step 5:
3880 divided by 391 is 9 with a remainder of 361.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Subtracting 3519 from 3880 leaves us with 361.
Take the next digit (2) from the dividend and append it to 361, then repeat: 3612 / 391

Step 6:
When dividing 3612 by 391, we get 9 with a remainder of 93.
The number 9 becomes the next digit in our result. 
Result so far: 399.0
Subtracting 3519 from 3612 leaves us with 93.
Bring next digit (5) of the dividend behind the 93 and repeat the process: 935 / 391

Moving on to step 7:
391 goes into 935 2 times with a remainder of 153.
The next digit of our result is 2. 
Result so far: 3992.0
Subtract 782 from 935 to get 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Moving on to step 8:
The number 391 fits into 1530 3 times, leaving a remainder of 357.
The next digit of our result is 3. 
Result so far: 3992.3
Subtracting 1173 from 1530 leaves us with 357.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

Moving on to step 9:
If we divide 3570 by 391, we get 9 and a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 3992.39
If we take 3519 away from 3570, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 10:
When dividing 510 by 391, we get 1 with a remainder of 119.
The next digit of our result is 1. 
Result so far: 3992.391
Deduct 391 from 510 and we're left with 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Let's proceed to step 11:
If we divide 1190 by 391, we get 3 and a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 3992.3913
If we take 1173 away from 1190, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 12:
391 can be fit into 170 0 times, resulting in a remainder of 170.
The number 0 becomes the next digit in our result. 
Result so far: 3992.3913
Subtracting 0 from 170 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 13:
When dividing 1700 by 391, we get 4 with a remainder of 136.
The number 4 becomes the next digit in our result. 
Result so far: 3992.391304
If we take 1564 away from 1700, we end up with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Moving on to step 14:
391 can be fit into 1360 3 times, resulting in a remainder of 187.
Use 3 as the next digit of our solution. 
Result so far: 3992.3913043
If we take 1173 away from 1360, we end up with 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

Step 15:
391 goes into 1870 4 times with a remainder of 306.
Record the quotient 4 as the next digit in the result. 
Result so far: 3992.39130434
Subtracting 1564 from 1870 leaves us with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

The quotient of the division is 3992.39130434, and the remainder is 3.06e-07.