26613633 divided by 645 
Let's see how many times 645 fits into 26613633.

Step 1:
645 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 645

Going ahead to step 2:
645 can be fit into 26 0 times, resulting in a remainder of 26.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 26 after subtracting 0 from 26.
Take the next digit (6) from the dividend and append it to 26, then repeat: 266 / 645

Step 3:
266 divided by 645 is 0 with a remainder of 266.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 266 to get 266.
Include the next digit (1) from the dividend after 266, then repeat: 2661 / 645

On to step 4:
645 goes into 2661 4 times with a remainder of 81.
The next digit of our result is 4. 
Result so far: 4.0
If we take 2580 away from 2661, we end up with 81.
Fetch the next digit (3) from the dividend, attach it to 81 and continue: 813 / 645

Going ahead to step 5:
645 can be fit into 813 1 times, resulting in a remainder of 168.
The number 1 becomes the next digit in our result. 
Result so far: 41.0
If we take 645 away from 813, we end up with 168.
Fetch the next digit (6) from the dividend, attach it to 168 and continue: 1686 / 645

Going ahead to step 6:
645 goes into 1686 2 times with a remainder of 396.
Write down 2 as next digit of the result. 
Result so far: 412.0
Deduct 1290 from 1686 and we're left with 396.
Include the next digit (3) from the dividend after 396, then repeat: 3963 / 645

Step 7:
The number 645 fits into 3963 6 times, leaving a remainder of 93.
The number 6 becomes the next digit in our result. 
Result so far: 4126.0
The remainder is 93 after subtracting 3870 from 3963.
Append the next digit (3) from the dividend to 93 and continue with: 933 / 645

Moving on to step 8:
If we divide 933 by 645, we get 1 and a remainder of 288.
Put 1 as the next digit of the answer. 
Result so far: 41261.0
The remainder is 288 after subtracting 645 from 933.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Step 9:
645 goes into 2880 4 times with a remainder of 300.
The next digit of our result is 4. 
Result so far: 41261.4
Subtracting 2580 from 2880 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Advancing to step 10:
When dividing 3000 by 645, we get 4 with a remainder of 420.
Use 4 as the next digit of our solution. 
Result so far: 41261.44
If we take 2580 away from 3000, we end up with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

After the division, we end up with 41261.44 and a remainder of 0.42.