We look at the division of 50830850 by 645 
Let's see how many times 645 fits into 50830850.

Moving on to step 1:
The number 645 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 645

Step 2:
645 can be fit into 50 0 times, resulting in a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Append the next digit (8) from the dividend to 50 and continue with: 508 / 645

Advancing to step 3:
508 divided by 645 is 0 with a remainder of 508.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 508 and we're left with 508.
Fetch the next digit (3) from the dividend, attach it to 508 and continue: 5083 / 645

Moving on to step 4:
5083 divided by 645 is 7 with a remainder of 568.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 4515 from 5083, we get 568.
Fetch the next digit (0) from the dividend, attach it to 568 and continue: 5680 / 645

Moving on to step 5:
5680 divided by 645 is 8 with a remainder of 520.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
Deduct 5160 from 5680 and we're left with 520.
Grab the next digit (8) from the dividend, add it to 520, then carry on: 5208 / 645

Going ahead to step 6:
The number 645 fits into 5208 8 times, leaving a remainder of 48.
Write down 8 as next digit of the result. 
Result so far: 788.0
Subtract 5160 from 5208 to get 48.
Take the next digit (5) from the dividend and append it to 48, then repeat: 485 / 645

Step 7:
The number 645 fits into 485 0 times, leaving a remainder of 485.
Put 0 as the next digit of the answer. 
Result so far: 7880.0
Deduct 0 from 485 and we're left with 485.
Bring next digit (0) of the dividend behind the 485 and repeat the process: 4850 / 645

Advancing to step 8:
645 can be fit into 4850 7 times, resulting in a remainder of 335.
Put 7 as the next digit of the answer. 
Result so far: 78807.0
Deduct 4515 from 4850 and we're left with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Advancing to step 9:
3350 divided by 645 is 5 with a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 78807.5
If we subtract 3225 from 3350, we get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 10:
The number 645 fits into 1250 1 times, leaving a remainder of 605.
The next digit of our result is 1. 
Result so far: 78807.51
The remainder is 605 after subtracting 645 from 1250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

Let's proceed to step 11:
6050 divided by 645 is 9 with a remainder of 245.
Use 9 as the next digit of our solution. 
Result so far: 78807.519
Subtracting 5805 from 6050 leaves us with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Let's proceed to step 12:
645 can be fit into 2450 3 times, resulting in a remainder of 515.
Put 3 as the next digit of the answer. 
Result so far: 78807.5193
The remainder is 515 after subtracting 1935 from 2450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

Advancing to step 13:
If we divide 5150 by 645, we get 7 and a remainder of 635.
Put 7 as the next digit of the answer. 
Result so far: 78807.51937
Subtract 4515 from 5150 to get 635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Going ahead to step 14:
645 can be fit into 6350 9 times, resulting in a remainder of 545.
Write down 9 as next digit of the result. 
Result so far: 78807.519379
If we subtract 5805 from 6350, we get 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Step 15:
645 can be fit into 5450 8 times, resulting in a remainder of 290.
The number 8 becomes the next digit in our result. 
Result so far: 78807.5193798
Subtracting 5160 from 5450 leaves us with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 16:
645 goes into 2900 4 times with a remainder of 320.
Put 4 as the next digit of the answer. 
Result so far: 78807.51937984
Subtract 2580 from 2900 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

The final result is 78807.51937984 with a remainder of 3.2e-07.