We divide 843189 by 2
Our goal is to divide 843189 by 2.

Advancing to step 1:
When dividing 8 by 2, we get 4 with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 8 from 8 and we're left with 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 2

On to step 2:
The number 2 fits into 4 2 times, leaving a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtract 4 from 4 to get 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 2

On to step 3:
If we divide 3 by 2, we get 1 and a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 421.0
If we take 2 away from 3, we end up with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 2

On to step 4:
If we divide 11 by 2, we get 5 and a remainder of 1.
The next digit of our result is 5. 
Result so far: 4215.0
Subtract 10 from 11 to get 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 2

Moving on to step 5:
2 can be fit into 18 9 times, resulting in a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 42159.0
Deduct 18 from 18 and we're left with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 2

Advancing to step 6:
2 goes into 9 4 times with a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 421594.0
The remainder is 1 after subtracting 8 from 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
The number 2 fits into 10 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 421594.5
If we take 10 away from 10, we end up 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.

Moving on to step 8:
When dividing 0 by 2, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 421594.5
Subtract 0 from 0 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.

Going ahead to step 9:
0 divided by 2 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 421594.5
If we subtract 0 from 0, we 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.

The final outcome is 421594.5, with a leftover of 0.0.