We look at the division of 15643644 by 7 
We want to figure out the number of times 15643644 can be divided by 7.

On to step 1:
If we divide 1 by 7, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 7

Step 2:
When dividing 15 by 7, we get 2 with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 14 from 15, we get 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 7

On to step 3:
7 goes into 16 2 times with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Subtract 14 from 16 to get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 7

Advancing to step 4:
7 goes into 24 3 times with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 223.0
If we take 21 away from 24, we end up with 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 7

Going ahead to step 5:
The number 7 fits into 33 4 times, leaving a remainder of 5.
The next digit of our result is 4. 
Result so far: 2234.0
Subtract 28 from 33 to get 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 7

Moving on to step 6:
When dividing 56 by 7, we get 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 22348.0
If we take 56 away from 56, we end up with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 7

Advancing to step 7:
7 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 223480.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 7

Advancing to step 8:
The number 7 fits into 44 6 times, leaving a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 2234806.0
Subtract 42 from 44 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.

Step 9:
7 goes into 20 2 times with a remainder of 6.
The next digit of our result is 2. 
Result so far: 2234806.2
If we take 14 away from 20, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 10:
If we divide 60 by 7, we get 8 and a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 2234806.28
Subtracting 56 from 60 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
When dividing 40 by 7, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 2234806.285
Deduct 35 from 40 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 12:
When dividing 50 by 7, we get 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 2234806.2857
If we take 49 away from 50, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 13:
7 can be fit into 10 1 times, resulting in a remainder of 3.
The next digit of our result is 1. 
Result so far: 2234806.28571
If we take 7 away from 10, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 14:
If we divide 30 by 7, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 2234806.285714
If we take 28 away from 30, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 15:
If we divide 20 by 7, we get 2 and a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2234806.2857142
If we subtract 14 from 20, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 16:
If we divide 60 by 7, we get 8 and a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 2234806.28571428
The remainder is 4 after subtracting 56 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

In conclusion, the division gives 2234806.28571428 with a balance of 4e-09.