We look at the division of 394157 by 2 
We want to figure out the number of times 394157 can be divided by 2.

On to step 1:
When dividing 3 by 2, we get 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 2 from 3 and we're left with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 2

Moving on to step 2:
If we divide 19 by 2, we get 9 and a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
Deduct 18 from 19 and we're left with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 2

Advancing to step 3:
If we divide 14 by 2, we get 7 and a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 197.0
If we subtract 14 from 14, we get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 2

Let's proceed to step 4:
The number 2 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 1970.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 2

Moving on to step 5:
If we divide 15 by 2, we get 7 and a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 19707.0
Deduct 14 from 15 and we're left with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 2

Moving on to step 6:
2 can be fit into 17 8 times, resulting in a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 197078.0
Deduct 16 from 17 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.

Let's proceed to step 7:
The number 2 fits into 10 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 197078.5
Deduct 10 from 10 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.

On to step 8:
When dividing 0 by 2, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 197078.5
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 9:
When dividing 0 by 2, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 197078.5
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.

The final result is 197078.5 with a remainder of 0.0.