We look at the division of 64136316 by 643 
We want to divide 64136316 by 643.

On to step 1:
When dividing 6 by 643, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 643

On to step 2:
If we divide 64 by 643, we get 0 and a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Take the next digit (1) from the dividend and append it to 64, then repeat: 641 / 643

Step 3:
643 goes into 641 0 times with a remainder of 641.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 641, we get 641.
Bring next digit (3) of the dividend behind the 641 and repeat the process: 6413 / 643

Moving on to step 4:
643 can be fit into 6413 9 times, resulting in a remainder of 626.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 5787 from 6413 and we're left with 626.
Take the next digit (6) from the dividend and append it to 626, then repeat: 6266 / 643

On to step 5:
643 can be fit into 6266 9 times, resulting in a remainder of 479.
Put 9 as the next digit of the answer. 
Result so far: 99.0
If we take 5787 away from 6266, we end up with 479.
Fetch the next digit (3) from the dividend, attach it to 479 and continue: 4793 / 643

Step 6:
If we divide 4793 by 643, we get 7 and a remainder of 292.
Write down 7 as next digit of the result. 
Result so far: 997.0
Subtract 4501 from 4793 to get 292.
Bring next digit (1) of the dividend behind the 292 and repeat the process: 2921 / 643

Let's proceed to step 7:
If we divide 2921 by 643, we get 4 and a remainder of 349.
Write down 4 as next digit of the result. 
Result so far: 9974.0
Subtracting 2572 from 2921 leaves us with 349.
Include the next digit (6) from the dividend after 349, then repeat: 3496 / 643

Moving on to step 8:
If we divide 3496 by 643, we get 5 and a remainder of 281.
The next digit of our result is 5. 
Result so far: 99745.0
Subtracting 3215 from 3496 leaves us with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Step 9:
643 goes into 2810 4 times with a remainder of 238.
Use 4 as the next digit of our solution. 
Result so far: 99745.4
Deduct 2572 from 2810 and we're left with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Moving on to step 10:
2380 divided by 643 is 3 with a remainder of 451.
Write down 3 as next digit of the result. 
Result so far: 99745.43
Subtract 1929 from 2380 to get 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

Going ahead to step 11:
If we divide 4510 by 643, we get 7 and a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 99745.437
Subtracting 4501 from 4510 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 12:
The number 643 fits into 90 0 times, leaving a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 99745.437
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 13:
The number 643 fits into 900 1 times, leaving a remainder of 257.
Use 1 as the next digit of our solution. 
Result so far: 99745.43701
Subtracting 643 from 900 leaves us with 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Going ahead to step 14:
643 goes into 2570 3 times with a remainder of 641.
Put 3 as the next digit of the answer. 
Result so far: 99745.437013
Subtract 1929 from 2570 to get 641.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6410, and continue the process.

Let's proceed to step 15:
The number 643 fits into 6410 9 times, leaving a remainder of 623.
Record the quotient 9 as the next digit in the result. 
Result so far: 99745.4370139
Deduct 5787 from 6410 and we're left with 623.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

Step 16:
The number 643 fits into 6230 9 times, leaving a remainder of 443.
Use 9 as the next digit of our solution. 
Result so far: 99745.43701399
Subtract 5787 from 6230 to get 443.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

The quotient of the division is 99745.43701399, and the remainder is 4.43e-07.