We're dividing 396980 by 42 
We're looking to find how many times 42 goes into 396980.

Advancing to step 1:
The number 42 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 42

Let's proceed to step 2:
39 divided by 42 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Bring next digit (6) of the dividend behind the 39 and repeat the process: 396 / 42

Going ahead to step 3:
The number 42 fits into 396 9 times, leaving a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 378 from 396 to get 18.
Grab the next digit (9) from the dividend, add it to 18, then carry on: 189 / 42

Step 4:
If we divide 189 by 42, we get 4 and a remainder of 21.
The next digit of our result is 4. 
Result so far: 94.0
Subtracting 168 from 189 leaves us with 21.
Fetch the next digit (8) from the dividend, attach it to 21 and continue: 218 / 42

Step 5:
218 divided by 42 is 5 with a remainder of 8.
Record the quotient 5 as the next digit in the result. 
Result so far: 945.0
If we take 210 away from 218, we end up with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 42

On to step 6:
80 divided by 42 is 1 with a remainder of 38.
The next digit of our result is 1. 
Result so far: 9451.0
Deduct 42 from 80 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 7:
When dividing 380 by 42, we get 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 9451.9
Deduct 378 from 380 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
The number 42 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9451.9
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
42 can be fit into 200 4 times, resulting in a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 9451.904
If we subtract 168 from 200, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 10:
The number 42 fits into 320 7 times, leaving a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 9451.9047
The remainder is 26 after subtracting 294 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 11:
If we divide 260 by 42, we get 6 and a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 9451.90476
The remainder is 8 after subtracting 252 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 12:
If we divide 80 by 42, we get 1 and a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 9451.904761
Deduct 42 from 80 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 13:
42 goes into 380 9 times with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 9451.9047619
If we subtract 378 from 380, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 14:
If we divide 20 by 42, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9451.9047619
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 9451.9047619, with a leftover of 2e-08.