We look at the division of 15981291 by 775 
We're looking to find how many times 775 goes into 15981291.

Advancing to step 1:
775 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.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 775

Going ahead to step 2:
The number 775 fits into 15 0 times, leaving a remainder of 15.
The next digit of our result is 0. 
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 / 775

Step 3:
If we divide 159 by 775, we get 0 and a remainder of 159.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 159 after subtracting 0 from 159.
Append the next digit (8) from the dividend to 159 and continue with: 1598 / 775

Step 4:
1598 divided by 775 is 2 with a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 1550 from 1598, we get 48.
Fetch the next digit (1) from the dividend, attach it to 48 and continue: 481 / 775

Advancing to step 5:
775 goes into 481 0 times with a remainder of 481.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Deduct 0 from 481 and we're left with 481.
Include the next digit (2) from the dividend after 481, then repeat: 4812 / 775

Step 6:
The number 775 fits into 4812 6 times, leaving a remainder of 162.
The number 6 becomes the next digit in our result. 
Result so far: 206.0
If we subtract 4650 from 4812, we get 162.
Fetch the next digit (9) from the dividend, attach it to 162 and continue: 1629 / 775

Going ahead to step 7:
If we divide 1629 by 775, we get 2 and a remainder of 79.
The number 2 becomes the next digit in our result. 
Result so far: 2062.0
If we subtract 1550 from 1629, we get 79.
Bring next digit (1) of the dividend behind the 79 and repeat the process: 791 / 775

Going ahead to step 8:
791 divided by 775 is 1 with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 20621.0
Deduct 775 from 791 and we're left 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 9:
If we divide 160 by 775, we get 0 and a remainder of 160.
Use 0 as the next digit of our solution. 
Result so far: 20621.0
Deduct 0 from 160 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 10:
The number 775 fits into 1600 2 times, leaving a remainder of 50.
The number 2 becomes the next digit in our result. 
Result so far: 20621.02
If we take 1550 away from 1600, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 11:
500 divided by 775 is 0 with a remainder of 500.
Use 0 as the next digit of our solution. 
Result so far: 20621.02
Subtracting 0 from 500 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Going ahead to step 12:
If we divide 5000 by 775, we get 6 and a remainder of 350.
Put 6 as the next digit of the answer. 
Result so far: 20621.0206
If we take 4650 away from 5000, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Step 13:
If we divide 3500 by 775, we get 4 and a remainder of 400.
Use 4 as the next digit of our solution. 
Result so far: 20621.02064
If we take 3100 away from 3500, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 14:
775 goes into 4000 5 times with a remainder of 125.
Put 5 as the next digit of the answer. 
Result so far: 20621.020645
Subtract 3875 from 4000 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Going ahead to step 15:
775 can be fit into 1250 1 times, resulting in a remainder of 475.
Put 1 as the next digit of the answer. 
Result so far: 20621.0206451
If we subtract 775 from 1250, we get 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

Step 16:
When dividing 4750 by 775, we get 6 with a remainder of 100.
Record the quotient 6 as the next digit in the result. 
Result so far: 20621.02064516
If we subtract 4650 from 4750, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

After the division, we end up with 20621.02064516 and a remainder of 1e-07.