Let's divide 13877225 by 645
We're looking to find how many times 645 goes into 13877225.

Advancing to step 1:
645 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 645

Moving on to step 2:
The number 645 fits into 13 0 times, leaving a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 645

Moving on to step 3:
645 goes into 138 0 times with a remainder of 138.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 138 to get 138.
Append the next digit (7) from the dividend to 138 and continue with: 1387 / 645

Step 4:
1387 divided by 645 is 2 with a remainder of 97.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 1290 from 1387, we get 97.
Grab the next digit (7) from the dividend, add it to 97, then carry on: 977 / 645

Step 5:
645 goes into 977 1 times with a remainder of 332.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
The remainder is 332 after subtracting 645 from 977.
Append the next digit (2) from the dividend to 332 and continue with: 3322 / 645

Advancing to step 6:
3322 divided by 645 is 5 with a remainder of 97.
The next digit of our result is 5. 
Result so far: 215.0
If we subtract 3225 from 3322, we get 97.
Fetch the next digit (2) from the dividend, attach it to 97 and continue: 972 / 645

Going ahead to step 7:
The number 645 fits into 972 1 times, leaving a remainder of 327.
The number 1 becomes the next digit in our result. 
Result so far: 2151.0
If we subtract 645 from 972, we get 327.
Grab the next digit (5) from the dividend, add it to 327, then carry on: 3275 / 645

Moving on to step 8:
The number 645 fits into 3275 5 times, leaving a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 21515.0
The remainder is 50 after subtracting 3225 from 3275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 9:
645 goes into 500 0 times with a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 21515.0
If we take 0 away from 500, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Advancing to step 10:
645 goes into 5000 7 times with a remainder of 485.
Record the quotient 7 as the next digit in the result. 
Result so far: 21515.07
If we take 4515 away from 5000, we end up with 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Going ahead to step 11:
When dividing 4850 by 645, we get 7 with a remainder of 335.
The next digit of our result is 7. 
Result so far: 21515.077
The remainder is 335 after subtracting 4515 from 4850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

After the division, we end up with 21515.077 and a remainder of 0.0335.