We look at the division of 397798 by 86 
We're looking to find how many times 86 goes into 397798.

Let's proceed to step 1:
If we divide 3 by 86, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 86

Let's proceed to step 2:
39 divided by 86 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Bring next digit (7) of the dividend behind the 39 and repeat the process: 397 / 86

Let's proceed to step 3:
If we divide 397 by 86, we get 4 and a remainder of 53.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 53 after subtracting 344 from 397.
Take the next digit (7) from the dividend and append it to 53, then repeat: 537 / 86

On to step 4:
86 can be fit into 537 6 times, resulting in a remainder of 21.
Use 6 as the next digit of our solution. 
Result so far: 46.0
Deduct 516 from 537 and we're left with 21.
Take the next digit (9) from the dividend and append it to 21, then repeat: 219 / 86

Advancing to step 5:
86 goes into 219 2 times with a remainder of 47.
The next digit of our result is 2. 
Result so far: 462.0
If we take 172 away from 219, we end up with 47.
Fetch the next digit (8) from the dividend, attach it to 47 and continue: 478 / 86

Step 6:
When dividing 478 by 86, we get 5 with a remainder of 48.
Write down 5 as next digit of the result. 
Result so far: 4625.0
If we take 430 away from 478, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 7:
86 goes into 480 5 times with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 4625.5
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
When dividing 500 by 86, we get 5 with a remainder of 70.
The number 5 becomes the next digit in our result. 
Result so far: 4625.55
Subtract 430 from 500 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

After the division, we end up with 4625.55 and a remainder of 0.07.