35290103 ÷ 309 
We're looking to find how many times 309 goes into 35290103.

On to step 1:
3 divided by 309 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 309

Step 2:
35 divided by 309 is 0 with a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Fetch the next digit (2) from the dividend, attach it to 35 and continue: 352 / 309

On to step 3:
The number 309 fits into 352 1 times, leaving a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 309 from 352 to get 43.
Append the next digit (9) from the dividend to 43 and continue with: 439 / 309

Going ahead to step 4:
When dividing 439 by 309, we get 1 with a remainder of 130.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Deduct 309 from 439 and we're left with 130.
Include the next digit (0) from the dividend after 130, then repeat: 1300 / 309

Going ahead to step 5:
1300 divided by 309 is 4 with a remainder of 64.
Record the quotient 4 as the next digit in the result. 
Result so far: 114.0
The remainder is 64 after subtracting 1236 from 1300.
Bring next digit (1) of the dividend behind the 64 and repeat the process: 641 / 309

On to step 6:
309 goes into 641 2 times with a remainder of 23.
Put 2 as the next digit of the answer. 
Result so far: 1142.0
Deduct 618 from 641 and we're left with 23.
Take the next digit (0) from the dividend and append it to 23, then repeat: 230 / 309

Advancing to step 7:
The number 309 fits into 230 0 times, leaving a remainder of 230.
The number 0 becomes the next digit in our result. 
Result so far: 11420.0
The remainder is 230 after subtracting 0 from 230.
Bring next digit (3) of the dividend behind the 230 and repeat the process: 2303 / 309

Going ahead to step 8:
The number 309 fits into 2303 7 times, leaving a remainder of 140.
The number 7 becomes the next digit in our result. 
Result so far: 114207.0
If we subtract 2163 from 2303, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 9:
309 goes into 1400 4 times with a remainder of 164.
The next digit of our result is 4. 
Result so far: 114207.4
If we take 1236 away from 1400, we end up with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Going ahead to step 10:
1640 divided by 309 is 5 with a remainder of 95.
Write down 5 as next digit of the result. 
Result so far: 114207.45
Subtract 1545 from 1640 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 11:
309 can be fit into 950 3 times, resulting in a remainder of 23.
The number 3 becomes the next digit in our result. 
Result so far: 114207.453
If we take 927 away from 950, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 12:
When dividing 230 by 309, we get 0 with a remainder of 230.
The number 0 becomes the next digit in our result. 
Result so far: 114207.453
Deduct 0 from 230 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Moving on to step 13:
When dividing 2300 by 309, we get 7 with a remainder of 137.
The next digit of our result is 7. 
Result so far: 114207.45307
Subtract 2163 from 2300 to get 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 14:
When dividing 1370 by 309, we get 4 with a remainder of 134.
The number 4 becomes the next digit in our result. 
Result so far: 114207.453074
Subtracting 1236 from 1370 leaves us with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Let's proceed to step 15:
The number 309 fits into 1340 4 times, leaving a remainder of 104.
The number 4 becomes the next digit in our result. 
Result so far: 114207.4530744
Deduct 1236 from 1340 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

The final outcome is 114207.4530744, with a leftover of 1.04e-06.