15837866 divided by 722 
We want to figure out the number of times 15837866 can be divided by 722.

On to step 1:
The number 722 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 722

Advancing to step 2:
If we divide 15 by 722, we get 0 and a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 722

On to step 3:
158 divided by 722 is 0 with a remainder of 158.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 158 and we're left with 158.
Append the next digit (3) from the dividend to 158 and continue with: 1583 / 722

On to step 4:
1583 divided by 722 is 2 with a remainder of 139.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 1444 from 1583 to get 139.
Fetch the next digit (7) from the dividend, attach it to 139 and continue: 1397 / 722

Going ahead to step 5:
If we divide 1397 by 722, we get 1 and a remainder of 675.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
The remainder is 675 after subtracting 722 from 1397.
Take the next digit (8) from the dividend and append it to 675, then repeat: 6758 / 722

Let's proceed to step 6:
6758 divided by 722 is 9 with a remainder of 260.
Put 9 as the next digit of the answer. 
Result so far: 219.0
Subtract 6498 from 6758 to get 260.
Take the next digit (6) from the dividend and append it to 260, then repeat: 2606 / 722

Step 7:
If we divide 2606 by 722, we get 3 and a remainder of 440.
The next digit of our result is 3. 
Result so far: 2193.0
Deduct 2166 from 2606 and we're left with 440.
Take the next digit (6) from the dividend and append it to 440, then repeat: 4406 / 722

Advancing to step 8:
If we divide 4406 by 722, we get 6 and a remainder of 74.
Write down 6 as next digit of the result. 
Result so far: 21936.0
If we subtract 4332 from 4406, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 9:
The number 722 fits into 740 1 times, leaving a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 21936.1
Deduct 722 from 740 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 10:
The number 722 fits into 180 0 times, leaving a remainder of 180.
Write down 0 as next digit of the result. 
Result so far: 21936.1
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Moving on to step 11:
722 can be fit into 1800 2 times, resulting in a remainder of 356.
Record the quotient 2 as the next digit in the result. 
Result so far: 21936.102
Subtracting 1444 from 1800 leaves us with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Advancing to step 12:
The number 722 fits into 3560 4 times, leaving a remainder of 672.
The next digit of our result is 4. 
Result so far: 21936.1024
Subtract 2888 from 3560 to get 672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

Going ahead to step 13:
When dividing 6720 by 722, we get 9 with a remainder of 222.
Record the quotient 9 as the next digit in the result. 
Result so far: 21936.10249
If we take 6498 away from 6720, we end up with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Let's proceed to step 14:
722 can be fit into 2220 3 times, resulting in a remainder of 54.
The number 3 becomes the next digit in our result. 
Result so far: 21936.102493
The remainder is 54 after subtracting 2166 from 2220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 15:
The number 722 fits into 540 0 times, leaving a remainder of 540.
Use 0 as the next digit of our solution. 
Result so far: 21936.102493
Subtracting 0 from 540 leaves us with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Moving on to step 16:
When dividing 5400 by 722, we get 7 with a remainder of 346.
The number 7 becomes the next digit in our result. 
Result so far: 21936.10249307
If we subtract 5054 from 5400, we get 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

The final outcome is 21936.10249307, with a leftover of 3.46e-07.