We're dividing 843870 by 2 
Our goal is to divide 843870 by 2.

Going ahead to step 1:
When dividing 8 by 2, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 8 from 8, we get 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 2

On to step 2:
When dividing 4 by 2, we get 2 with 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.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 2

Advancing to step 3:
The number 2 fits into 3 1 times, leaving a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 421.0
If we subtract 2 from 3, we get 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 2

Let's proceed to step 4:
If we divide 18 by 2, we get 9 and a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 4219.0
The remainder is 0 after subtracting 18 from 18.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 2

Going ahead to step 5:
When dividing 7 by 2, we get 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 42193.0
Subtract 6 from 7 to get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 2

Going ahead to step 6:
2 goes into 10 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 421935.0
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.

Advancing to step 7:
If we divide 0 by 2, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 421935.0
If we take 0 away from 0, 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.

On to step 8:
The number 2 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 421935.0
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 421935.0 and a remainder of 0.0.