We divide 843881 by 2
We want to divide 843881 by 2.

Going ahead to step 1:
2 goes into 8 4 times with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 0 after subtracting 8 from 8.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 2

Advancing to step 2:
2 goes into 4 2 times with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Subtracting 4 from 4 leaves us with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 2

Going ahead to step 3:
If we divide 3 by 2, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 421.0
Deduct 2 from 3 and we're left with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 2

Advancing to step 4:
2 goes into 18 9 times with a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 4219.0
Deduct 18 from 18 and we're left with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 2

Going ahead to step 5:
2 can be fit into 8 4 times, resulting in a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 42194.0
If we subtract 8 from 8, we get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 2

Step 6:
1 divided by 2 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 421940.0
Deduct 0 from 1 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
The number 2 fits into 10 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 421940.5
Subtract 10 from 10 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
2 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 421940.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
If we divide 0 by 2, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 421940.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 421940.5 and a remainder of 0.0.