We look at the division of 423420 by 35 
Let's see how many times 35 fits into 423420.

On to step 1:
4 divided by 35 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 35

Let's proceed to step 2:
The number 35 fits into 42 1 times, leaving a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 7 after subtracting 35 from 42.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 35

Advancing to step 3:
If we divide 73 by 35, we get 2 and a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 70 from 73 to get 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 35

Let's proceed to step 4:
The number 35 fits into 34 0 times, leaving a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 120.0
Subtracting 0 from 34 leaves us with 34.
Fetch the next digit (2) from the dividend, attach it to 34 and continue: 342 / 35

Step 5:
342 divided by 35 is 9 with a remainder of 27.
The number 9 becomes the next digit in our result. 
Result so far: 1209.0
Subtracting 315 from 342 leaves us with 27.
Append the next digit (0) from the dividend to 27 and continue with: 270 / 35

Let's proceed to step 6:
35 goes into 270 7 times with a remainder of 25.
The number 7 becomes the next digit in our result. 
Result so far: 12097.0
Deduct 245 from 270 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 7:
35 can be fit into 250 7 times, resulting in a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 12097.7
Deduct 245 from 250 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 8:
If we divide 50 by 35, we get 1 and a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 12097.71
If we subtract 35 from 50, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 9:
When dividing 150 by 35, we get 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 12097.714
If we take 140 away from 150, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
The number 35 fits into 100 2 times, leaving a remainder of 30.
The number 2 becomes the next digit in our result. 
Result so far: 12097.7142
If we subtract 70 from 100, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 11:
300 divided by 35 is 8 with a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 12097.71428
The remainder is 20 after subtracting 280 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
The number 35 fits into 200 5 times, leaving a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 12097.714285
Subtract 175 from 200 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 13:
35 can be fit into 250 7 times, resulting in a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 12097.7142857
Deduct 245 from 250 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 14:
The number 35 fits into 50 1 times, leaving a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 12097.71428571
If we subtract 35 from 50, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 12097.71428571 with a remainder of 1.5e-08.