4209 ÷ 35 
Let's see how many times 35 fits into 4209.

Going ahead 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
Subtracting 0 from 4 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 35

On to step 2:
35 goes into 42 1 times with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 7 after subtracting 35 from 42.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 35

Going ahead to step 3:
35 goes into 70 2 times 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.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 35

Going ahead to step 4:
35 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 120.0
Subtract 0 from 9 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 5:
When dividing 90 by 35, we get 2 with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 120.2
If we subtract 70 from 90, we 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.

Step 6:
200 divided by 35 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 120.25
If we subtract 175 from 200, we 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 7:
35 can be fit into 250 7 times, resulting in a remainder of 5.
The next digit of our result is 7. 
Result so far: 120.257
The remainder is 5 after subtracting 245 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
35 goes into 50 1 times with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 120.2571
The remainder is 15 after subtracting 35 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 9:
If we divide 150 by 35, we get 4 and a remainder of 10.
The next digit of our result is 4. 
Result so far: 120.25714
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 10:
100 divided by 35 is 2 with a remainder of 30.
Write down 2 as next digit of the result. 
Result so far: 120.257142
Subtract 70 from 100 to 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:
When dividing 300 by 35, we get 8 with a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 120.2571428
Subtract 280 from 300 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.

Moving on to step 12:
35 can be fit into 200 5 times, resulting in a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 120.25714285
If we take 175 away from 200, we end up 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.

In conclusion, the division gives 120.25714285 with a balance of 2.5e-08.