15966749 ÷ 637 
Our goal is to divide 15966749 by 637.

On to step 1:
If we divide 1 by 637, we get 0 and 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.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 637

Step 2:
637 can be fit into 15 0 times, resulting in a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 637

Going ahead to step 3:
The number 637 fits into 159 0 times, leaving a remainder of 159.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 159 to get 159.
Fetch the next digit (6) from the dividend, attach it to 159 and continue: 1596 / 637

Let's proceed to step 4:
When dividing 1596 by 637, we get 2 with a remainder of 322.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 1274 from 1596, we get 322.
Grab the next digit (6) from the dividend, add it to 322, then carry on: 3226 / 637

Going ahead to step 5:
3226 divided by 637 is 5 with a remainder of 41.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtracting 3185 from 3226 leaves us with 41.
Fetch the next digit (7) from the dividend, attach it to 41 and continue: 417 / 637

Let's proceed to step 6:
When dividing 417 by 637, we get 0 with a remainder of 417.
Write down 0 as next digit of the result. 
Result so far: 250.0
Deduct 0 from 417 and we're left with 417.
Append the next digit (4) from the dividend to 417 and continue with: 4174 / 637

Advancing to step 7:
4174 divided by 637 is 6 with a remainder of 352.
Record the quotient 6 as the next digit in the result. 
Result so far: 2506.0
Deduct 3822 from 4174 and we're left with 352.
Bring next digit (9) of the dividend behind the 352 and repeat the process: 3529 / 637

On to step 8:
3529 divided by 637 is 5 with a remainder of 344.
Write down 5 as next digit of the result. 
Result so far: 25065.0
Subtracting 3185 from 3529 leaves us with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Advancing to step 9:
637 goes into 3440 5 times with a remainder of 255.
The next digit of our result is 5. 
Result so far: 25065.5
Subtract 3185 from 3440 to get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 10:
When dividing 2550 by 637, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 25065.54
Subtract 2548 from 2550 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 11:
637 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 25065.54
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
637 goes into 200 0 times with a remainder of 200.
The next digit of our result is 0. 
Result so far: 25065.54
Subtracting 0 from 200 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 25065.54 and a remainder of 0.002.