48239007 divided by 645 
We want to divide 48239007 by 645.

Step 1:
4 divided by 645 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 645

Moving on to step 2:
645 goes into 48 0 times with a remainder of 48.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 48, we end up with 48.
Bring next digit (2) of the dividend behind the 48 and repeat the process: 482 / 645

Let's proceed to step 3:
482 divided by 645 is 0 with a remainder of 482.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 482, we end up with 482.
Append the next digit (3) from the dividend to 482 and continue with: 4823 / 645

Step 4:
645 goes into 4823 7 times with a remainder of 308.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 4515 from 4823 and we're left with 308.
Take the next digit (9) from the dividend and append it to 308, then repeat: 3089 / 645

Let's proceed to step 5:
645 goes into 3089 4 times with a remainder of 509.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
Subtracting 2580 from 3089 leaves us with 509.
Grab the next digit (0) from the dividend, add it to 509, then carry on: 5090 / 645

Advancing to step 6:
The number 645 fits into 5090 7 times, leaving a remainder of 575.
Use 7 as the next digit of our solution. 
Result so far: 747.0
Subtract 4515 from 5090 to get 575.
Append the next digit (0) from the dividend to 575 and continue with: 5750 / 645

Advancing to step 7:
645 can be fit into 5750 8 times, resulting in a remainder of 590.
The next digit of our result is 8. 
Result so far: 7478.0
Deduct 5160 from 5750 and we're left with 590.
Grab the next digit (7) from the dividend, add it to 590, then carry on: 5907 / 645

Moving on to step 8:
645 goes into 5907 9 times with a remainder of 102.
Put 9 as the next digit of the answer. 
Result so far: 74789.0
If we take 5805 away from 5907, we end up with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Step 9:
If we divide 1020 by 645, we get 1 and a remainder of 375.
The number 1 becomes the next digit in our result. 
Result so far: 74789.1
If we take 645 away from 1020, we end up with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Going ahead to step 10:
The number 645 fits into 3750 5 times, leaving a remainder of 525.
The number 5 becomes the next digit in our result. 
Result so far: 74789.15
If we subtract 3225 from 3750, we get 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Going ahead to step 11:
If we divide 5250 by 645, we get 8 and a remainder of 90.
The number 8 becomes the next digit in our result. 
Result so far: 74789.158
Subtracting 5160 from 5250 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 12:
When dividing 900 by 645, we get 1 with a remainder of 255.
Record the quotient 1 as the next digit in the result. 
Result so far: 74789.1581
If we subtract 645 from 900, we get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Advancing to step 13:
645 goes into 2550 3 times with a remainder of 615.
The number 3 becomes the next digit in our result. 
Result so far: 74789.15813
Subtract 1935 from 2550 to get 615.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

Going ahead to step 14:
If we divide 6150 by 645, we get 9 and a remainder of 345.
Write down 9 as next digit of the result. 
Result so far: 74789.158139
Deduct 5805 from 6150 and we're left with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Step 15:
If we divide 3450 by 645, we get 5 and a remainder of 225.
Write down 5 as next digit of the result. 
Result so far: 74789.1581395
Subtracting 3225 from 3450 leaves us with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Step 16:
When dividing 2250 by 645, we get 3 with a remainder of 315.
Put 3 as the next digit of the answer. 
Result so far: 74789.15813953
Deduct 1935 from 2250 and we're left with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

The final outcome is 74789.15813953, with a leftover of 3.15e-07.