Let's divide 15799121 by 774
We want to figure out the number of times 15799121 can be divided by 774.

Going ahead to step 1:
1 divided by 774 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 774

On to step 2:
When dividing 15 by 774, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Fetch the next digit (7) from the dividend, attach it to 15 and continue: 157 / 774

Step 3:
When dividing 157 by 774, we get 0 with a remainder of 157.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 157 after subtracting 0 from 157.
Fetch the next digit (9) from the dividend, attach it to 157 and continue: 1579 / 774

Moving on to step 4:
774 can be fit into 1579 2 times, resulting in a remainder of 31.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1548 from 1579 and we're left with 31.
Take the next digit (9) from the dividend and append it to 31, then repeat: 319 / 774

Step 5:
The number 774 fits into 319 0 times, leaving a remainder of 319.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Subtracting 0 from 319 leaves us with 319.
Take the next digit (1) from the dividend and append it to 319, then repeat: 3191 / 774

Step 6:
3191 divided by 774 is 4 with a remainder of 95.
Write down 4 as next digit of the result. 
Result so far: 204.0
If we subtract 3096 from 3191, we get 95.
Take the next digit (2) from the dividend and append it to 95, then repeat: 952 / 774

Step 7:
If we divide 952 by 774, we get 1 and a remainder of 178.
Write down 1 as next digit of the result. 
Result so far: 2041.0
Subtracting 774 from 952 leaves us with 178.
Include the next digit (1) from the dividend after 178, then repeat: 1781 / 774

Going ahead to step 8:
When dividing 1781 by 774, we get 2 with a remainder of 233.
The next digit of our result is 2. 
Result so far: 20412.0
Subtract 1548 from 1781 to get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Let's proceed to step 9:
774 can be fit into 2330 3 times, resulting in a remainder of 8.
The next digit of our result is 3. 
Result so far: 20412.3
If we subtract 2322 from 2330, 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.

Advancing to step 10:
774 can be fit into 80 0 times, resulting in a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 20412.3
If we subtract 0 from 80, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 11:
The number 774 fits into 800 1 times, leaving a remainder of 26.
Write down 1 as next digit of the result. 
Result so far: 20412.301
Deduct 774 from 800 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 12:
If we divide 260 by 774, we get 0 and a remainder of 260.
Record the quotient 0 as the next digit in the result. 
Result so far: 20412.301
If we take 0 away from 260, we end up with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 13:
If we divide 2600 by 774, we get 3 and a remainder of 278.
Put 3 as the next digit of the answer. 
Result so far: 20412.30103
Subtract 2322 from 2600 to get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Moving on to step 14:
When dividing 2780 by 774, we get 3 with a remainder of 458.
The number 3 becomes the next digit in our result. 
Result so far: 20412.301033
Deduct 2322 from 2780 and we're left with 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

After the division, we end up with 20412.301033 and a remainder of 4.58e-05.