643878 divided by 99 
We want to divide 643878 by 99.

Let's proceed to step 1:
If we divide 6 by 99, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 99

Moving on to step 2:
99 can be fit into 64 0 times, resulting in a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Append the next digit (3) from the dividend to 64 and continue with: 643 / 99

Advancing to step 3:
643 divided by 99 is 6 with a remainder of 49.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 594 from 643 to get 49.
Take the next digit (8) from the dividend and append it to 49, then repeat: 498 / 99

Advancing to step 4:
99 goes into 498 5 times with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 65.0
Subtracting 495 from 498 leaves us with 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 99

Advancing to step 5:
37 divided by 99 is 0 with a remainder of 37.
Record the quotient 0 as the next digit in the result. 
Result so far: 650.0
Subtract 0 from 37 to get 37.
Bring next digit (8) of the dividend behind the 37 and repeat the process: 378 / 99

Step 6:
378 divided by 99 is 3 with a remainder of 81.
Write down 3 as next digit of the result. 
Result so far: 6503.0
Deduct 297 from 378 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 7:
The number 99 fits into 810 8 times, leaving a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 6503.8
Subtracting 792 from 810 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 8:
99 goes into 180 1 times with a remainder of 81.
Use 1 as the next digit of our solution. 
Result so far: 6503.81
If we take 99 away from 180, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 9:
The number 99 fits into 810 8 times, leaving a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 6503.818
If we subtract 792 from 810, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 10:
If we divide 180 by 99, we get 1 and a remainder of 81.
The number 1 becomes the next digit in our result. 
Result so far: 6503.8181
The remainder is 81 after subtracting 99 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 11:
99 can be fit into 810 8 times, resulting in a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 6503.81818
Subtract 792 from 810 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 12:
180 divided by 99 is 1 with a remainder of 81.
Write down 1 as next digit of the result. 
Result so far: 6503.818181
Subtracting 99 from 180 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 13:
99 goes into 810 8 times with a remainder of 18.
The next digit of our result is 8. 
Result so far: 6503.8181818
If we take 792 away from 810, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 14:
The number 99 fits into 180 1 times, leaving a remainder of 81.
Record the quotient 1 as the next digit in the result. 
Result so far: 6503.81818181
Subtract 99 from 180 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

The quotient of the division is 6503.81818181, and the remainder is 8.1e-08.