We look at the division of 25368822 by 643 
Our goal is to divide 25368822 by 643.

Going ahead to step 1:
When dividing 2 by 643, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 643

Step 2:
25 divided by 643 is 0 with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Fetch the next digit (3) from the dividend, attach it to 25 and continue: 253 / 643

Let's proceed to step 3:
643 can be fit into 253 0 times, resulting in a remainder of 253.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 253, we end up with 253.
Take the next digit (6) from the dividend and append it to 253, then repeat: 2536 / 643

On to step 4:
The number 643 fits into 2536 3 times, leaving a remainder of 607.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 1929 from 2536 to get 607.
Grab the next digit (8) from the dividend, add it to 607, then carry on: 6078 / 643

Advancing to step 5:
643 can be fit into 6078 9 times, resulting in a remainder of 291.
Put 9 as the next digit of the answer. 
Result so far: 39.0
Subtract 5787 from 6078 to get 291.
Bring next digit (8) of the dividend behind the 291 and repeat the process: 2918 / 643

Moving on to step 6:
When dividing 2918 by 643, we get 4 with a remainder of 346.
Put 4 as the next digit of the answer. 
Result so far: 394.0
If we subtract 2572 from 2918, we get 346.
Append the next digit (2) from the dividend to 346 and continue with: 3462 / 643

Advancing to step 7:
643 can be fit into 3462 5 times, resulting in a remainder of 247.
Put 5 as the next digit of the answer. 
Result so far: 3945.0
Subtracting 3215 from 3462 leaves us with 247.
Bring next digit (2) of the dividend behind the 247 and repeat the process: 2472 / 643

Moving on to step 8:
The number 643 fits into 2472 3 times, leaving a remainder of 543.
The number 3 becomes the next digit in our result. 
Result so far: 39453.0
Subtracting 1929 from 2472 leaves us with 543.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5430, and continue the process.

Going ahead to step 9:
643 goes into 5430 8 times with a remainder of 286.
The next digit of our result is 8. 
Result so far: 39453.8
Subtract 5144 from 5430 to get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

On to step 10:
The number 643 fits into 2860 4 times, leaving a remainder of 288.
The next digit of our result is 4. 
Result so far: 39453.84
If we subtract 2572 from 2860, we get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Going ahead to step 11:
When dividing 2880 by 643, we get 4 with a remainder of 308.
Record the quotient 4 as the next digit in the result. 
Result so far: 39453.844
If we take 2572 away from 2880, we end up with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

After the division, we end up with 39453.844 and a remainder of 0.0308.