Let's divide 80439930 by 957
We're looking to find how many times 957 goes into 80439930.

On to step 1:
When dividing 8 by 957, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 957

Going ahead to step 2:
When dividing 80 by 957, we get 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Bring next digit (4) of the dividend behind the 80 and repeat the process: 804 / 957

Moving on to step 3:
If we divide 804 by 957, we get 0 and a remainder of 804.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 804 after subtracting 0 from 804.
Take the next digit (3) from the dividend and append it to 804, then repeat: 8043 / 957

On to step 4:
8043 divided by 957 is 8 with a remainder of 387.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 7656 from 8043 and we're left with 387.
Bring next digit (9) of the dividend behind the 387 and repeat the process: 3879 / 957

Advancing to step 5:
When dividing 3879 by 957, we get 4 with a remainder of 51.
Use 4 as the next digit of our solution. 
Result so far: 84.0
Subtract 3828 from 3879 to get 51.
Fetch the next digit (9) from the dividend, attach it to 51 and continue: 519 / 957

Going ahead to step 6:
957 can be fit into 519 0 times, resulting in a remainder of 519.
Record the quotient 0 as the next digit in the result. 
Result so far: 840.0
The remainder is 519 after subtracting 0 from 519.
Bring next digit (3) of the dividend behind the 519 and repeat the process: 5193 / 957

Moving on to step 7:
If we divide 5193 by 957, we get 5 and a remainder of 408.
Put 5 as the next digit of the answer. 
Result so far: 8405.0
Subtracting 4785 from 5193 leaves us with 408.
Bring next digit (0) of the dividend behind the 408 and repeat the process: 4080 / 957

Advancing to step 8:
957 goes into 4080 4 times with a remainder of 252.
Write down 4 as next digit of the result. 
Result so far: 84054.0
Deduct 3828 from 4080 and we're left with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Let's proceed to step 9:
957 goes into 2520 2 times with a remainder of 606.
The number 2 becomes the next digit in our result. 
Result so far: 84054.2
If we take 1914 away from 2520, we end up with 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

On to step 10:
When dividing 6060 by 957, we get 6 with a remainder of 318.
The number 6 becomes the next digit in our result. 
Result so far: 84054.26
Subtract 5742 from 6060 to get 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Let's proceed to step 11:
When dividing 3180 by 957, we get 3 with a remainder of 309.
Write down 3 as next digit of the result. 
Result so far: 84054.263
Deduct 2871 from 3180 and we're left with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Moving on to step 12:
957 goes into 3090 3 times with a remainder of 219.
The next digit of our result is 3. 
Result so far: 84054.2633
If we take 2871 away from 3090, we end up with 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

The final result is 84054.2633 with a remainder of 0.00219.