50284129 divided by 645 
We want to divide 50284129 by 645.

Advancing to step 1:
645 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 645

On to 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
The remainder is 50 after subtracting 0 from 50.
Take the next digit (2) from the dividend and append it to 50, then repeat: 502 / 645

Step 3:
502 divided by 645 is 0 with a remainder of 502.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 502, we end up with 502.
Grab the next digit (8) from the dividend, add it to 502, then carry on: 5028 / 645

Let's proceed to step 4:
When dividing 5028 by 645, we get 7 with a remainder of 513.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 4515 from 5028, we get 513.
Append the next digit (4) from the dividend to 513 and continue with: 5134 / 645

Step 5:
When dividing 5134 by 645, we get 7 with a remainder of 619.
The next digit of our result is 7. 
Result so far: 77.0
Subtract 4515 from 5134 to get 619.
Append the next digit (1) from the dividend to 619 and continue with: 6191 / 645

Advancing to step 6:
When dividing 6191 by 645, we get 9 with a remainder of 386.
The next digit of our result is 9. 
Result so far: 779.0
Deduct 5805 from 6191 and we're left with 386.
Fetch the next digit (2) from the dividend, attach it to 386 and continue: 3862 / 645

Let's proceed to step 7:
645 can be fit into 3862 5 times, resulting in a remainder of 637.
Put 5 as the next digit of the answer. 
Result so far: 7795.0
Subtract 3225 from 3862 to get 637.
Grab the next digit (9) from the dividend, add it to 637, then carry on: 6379 / 645

Going ahead to step 8:
645 goes into 6379 9 times with a remainder of 574.
The next digit of our result is 9. 
Result so far: 77959.0
Deduct 5805 from 6379 and we're left with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

Going ahead to step 9:
When dividing 5740 by 645, we get 8 with a remainder of 580.
The number 8 becomes the next digit in our result. 
Result so far: 77959.8
Deduct 5160 from 5740 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Moving on to step 10:
645 goes into 5800 8 times with a remainder of 640.
Record the quotient 8 as the next digit in the result. 
Result so far: 77959.88
Deduct 5160 from 5800 and we're left with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

The final outcome is 77959.88, with a leftover of 0.64.