We look at the division of 75705912 by 645 
Let's see how many times 645 fits into 75705912.

Moving on to step 1:
The number 645 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 645

On to step 2:
645 can be fit into 75 0 times, resulting in a remainder of 75.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 75 to get 75.
Append the next digit (7) from the dividend to 75 and continue with: 757 / 645

Step 3:
645 can be fit into 757 1 times, resulting in a remainder of 112.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 645 from 757, we get 112.
Include the next digit (0) from the dividend after 112, then repeat: 1120 / 645

Step 4:
645 can be fit into 1120 1 times, resulting in a remainder of 475.
Put 1 as the next digit of the answer. 
Result so far: 11.0
The remainder is 475 after subtracting 645 from 1120.
Bring next digit (5) of the dividend behind the 475 and repeat the process: 4755 / 645

Let's proceed to step 5:
4755 divided by 645 is 7 with a remainder of 240.
The number 7 becomes the next digit in our result. 
Result so far: 117.0
The remainder is 240 after subtracting 4515 from 4755.
Grab the next digit (9) from the dividend, add it to 240, then carry on: 2409 / 645

Let's proceed to step 6:
645 goes into 2409 3 times with a remainder of 474.
The next digit of our result is 3. 
Result so far: 1173.0
If we subtract 1935 from 2409, we get 474.
Take the next digit (1) from the dividend and append it to 474, then repeat: 4741 / 645

Step 7:
4741 divided by 645 is 7 with a remainder of 226.
The next digit of our result is 7. 
Result so far: 11737.0
Deduct 4515 from 4741 and we're left with 226.
Include the next digit (2) from the dividend after 226, then repeat: 2262 / 645

Let's proceed to step 8:
645 can be fit into 2262 3 times, resulting in a remainder of 327.
Record the quotient 3 as the next digit in the result. 
Result so far: 117373.0
Deduct 1935 from 2262 and we're left with 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Step 9:
If we divide 3270 by 645, we get 5 and a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 117373.5
Subtracting 3225 from 3270 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 10:
645 goes into 450 0 times with a remainder of 450.
The next digit of our result is 0. 
Result so far: 117373.5
Deduct 0 from 450 and we're left with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Going ahead to step 11:
The number 645 fits into 4500 6 times, leaving a remainder of 630.
Write down 6 as next digit of the result. 
Result so far: 117373.506
Subtracting 3870 from 4500 leaves us with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Going ahead to step 12:
645 goes into 6300 9 times with a remainder of 495.
Record the quotient 9 as the next digit in the result. 
Result so far: 117373.5069
The remainder is 495 after subtracting 5805 from 6300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

On to step 13:
The number 645 fits into 4950 7 times, leaving a remainder of 435.
The number 7 becomes the next digit in our result. 
Result so far: 117373.50697
If we subtract 4515 from 4950, we get 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

Step 14:
4350 divided by 645 is 6 with a remainder of 480.
The number 6 becomes the next digit in our result. 
Result so far: 117373.506976
Subtracting 3870 from 4350 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 15:
If we divide 4800 by 645, we get 7 and a remainder of 285.
Write down 7 as next digit of the result. 
Result so far: 117373.5069767
Subtracting 4515 from 4800 leaves us with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Step 16:
2850 divided by 645 is 4 with a remainder of 270.
The next digit of our result is 4. 
Result so far: 117373.50697674
Subtract 2580 from 2850 to get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Our division results in 117373.50697674 with a remaining 2.7e-07.