We're dividing 25077030 by 645 
We're looking to find how many times 645 goes into 25077030.

On to step 1:
The number 645 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 645

Let's proceed to step 2:
If we divide 25 by 645, we get 0 and a remainder of 25.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 645

Step 3:
The number 645 fits into 250 0 times, leaving a remainder of 250.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 250, we end up with 250.
Append the next digit (7) from the dividend to 250 and continue with: 2507 / 645

Going ahead to step 4:
645 can be fit into 2507 3 times, resulting in a remainder of 572.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 1935 from 2507 and we're left with 572.
Fetch the next digit (7) from the dividend, attach it to 572 and continue: 5727 / 645

Advancing to step 5:
645 can be fit into 5727 8 times, resulting in a remainder of 567.
Put 8 as the next digit of the answer. 
Result so far: 38.0
Subtracting 5160 from 5727 leaves us with 567.
Bring next digit (0) of the dividend behind the 567 and repeat the process: 5670 / 645

On to step 6:
645 can be fit into 5670 8 times, resulting in a remainder of 510.
Record the quotient 8 as the next digit in the result. 
Result so far: 388.0
Subtract 5160 from 5670 to get 510.
Append the next digit (3) from the dividend to 510 and continue with: 5103 / 645

On to step 7:
The number 645 fits into 5103 7 times, leaving a remainder of 588.
The next digit of our result is 7. 
Result so far: 3887.0
The remainder is 588 after subtracting 4515 from 5103.
Grab the next digit (0) from the dividend, add it to 588, then carry on: 5880 / 645

Going ahead to step 8:
645 can be fit into 5880 9 times, resulting in a remainder of 75.
Write down 9 as next digit of the result. 
Result so far: 38879.0
If we take 5805 away from 5880, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 9:
750 divided by 645 is 1 with a remainder of 105.
Use 1 as the next digit of our solution. 
Result so far: 38879.1
Subtract 645 from 750 to get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Advancing to step 10:
If we divide 1050 by 645, we get 1 and a remainder of 405.
The next digit of our result is 1. 
Result so far: 38879.11
If we take 645 away from 1050, we end up with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

After the division, we end up with 38879.11 and a remainder of 0.405.