We look at the division of 420016 by 35 
We're looking to find how many times 35 goes into 420016.

On to step 1:
The number 35 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 35

On to step 2:
The number 35 fits into 42 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 35 from 42 and we're left with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 35

Advancing to step 3:
70 divided by 35 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 70 from 70, we get 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 35

Advancing to step 4:
The number 35 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 120.0
If we take 0 away from 0, we end up with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 35

Advancing to step 5:
35 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 1200.0
If we subtract 0 from 1, we get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 35

Step 6:
When dividing 16 by 35, we get 0 with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 12000.0
Deduct 0 from 16 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 7:
35 goes into 160 4 times with a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 12000.4
Subtract 140 from 160 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
35 can be fit into 200 5 times, resulting in a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 12000.45
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.

Advancing to step 9:
250 divided by 35 is 7 with a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 12000.457
Subtracting 245 from 250 leaves us 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.

Advancing to step 10:
When dividing 50 by 35, we get 1 with a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 12000.4571
Subtract 35 from 50 to 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 11:
When dividing 150 by 35, we get 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 12000.45714
Subtract 140 from 150 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 12:
The number 35 fits into 100 2 times, leaving a remainder of 30.
The next digit of our result is 2. 
Result so far: 12000.457142
If we take 70 away from 100, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 13:
If we divide 300 by 35, we get 8 and a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 12000.4571428
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.

Step 14:
When dividing 200 by 35, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 12000.45714285
The remainder is 25 after subtracting 175 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The final outcome is 12000.45714285, with a leftover of 2.5e-08.