50155237 ÷ 645 
We want to figure out the number of times 50155237 can be divided by 645.

On to step 1:
5 divided by 645 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 645

Let's proceed to step 2:
50 divided by 645 is 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 50 leaves us with 50.
Include the next digit (1) from the dividend after 50, then repeat: 501 / 645

Let's proceed to step 3:
If we divide 501 by 645, we get 0 and a remainder of 501.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 501 and we're left with 501.
Include the next digit (5) from the dividend after 501, then repeat: 5015 / 645

On to step 4:
5015 divided by 645 is 7 with a remainder of 500.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 4515 away from 5015, we end up with 500.
Append the next digit (5) from the dividend to 500 and continue with: 5005 / 645

Going ahead to step 5:
645 goes into 5005 7 times with a remainder of 490.
Use 7 as the next digit of our solution. 
Result so far: 77.0
Deduct 4515 from 5005 and we're left with 490.
Grab the next digit (2) from the dividend, add it to 490, then carry on: 4902 / 645

Moving on to step 6:
When dividing 4902 by 645, we get 7 with a remainder of 387.
The next digit of our result is 7. 
Result so far: 777.0
The remainder is 387 after subtracting 4515 from 4902.
Fetch the next digit (3) from the dividend, attach it to 387 and continue: 3873 / 645

On to step 7:
3873 divided by 645 is 6 with a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 7776.0
If we subtract 3870 from 3873, we get 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 645

Going ahead to step 8:
When dividing 37 by 645, we get 0 with a remainder of 37.
Put 0 as the next digit of the answer. 
Result so far: 77760.0
The remainder is 37 after subtracting 0 from 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 9:
If we divide 370 by 645, we get 0 and a remainder of 370.
Use 0 as the next digit of our solution. 
Result so far: 77760.0
Subtracting 0 from 370 leaves us with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 10:
When dividing 3700 by 645, we get 5 with a remainder of 475.
The number 5 becomes the next digit in our result. 
Result so far: 77760.05
If we subtract 3225 from 3700, we get 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

On to step 11:
The number 645 fits into 4750 7 times, leaving a remainder of 235.
The next digit of our result is 7. 
Result so far: 77760.057
If we take 4515 away from 4750, we end up with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 12:
645 goes into 2350 3 times with a remainder of 415.
The number 3 becomes the next digit in our result. 
Result so far: 77760.0573
Deduct 1935 from 2350 and we're left with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Let's proceed to step 13:
If we divide 4150 by 645, we get 6 and a remainder of 280.
The number 6 becomes the next digit in our result. 
Result so far: 77760.05736
Subtracting 3870 from 4150 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Let's proceed to step 14:
645 goes into 2800 4 times with a remainder of 220.
Use 4 as the next digit of our solution. 
Result so far: 77760.057364
The remainder is 220 after subtracting 2580 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 15:
If we divide 2200 by 645, we get 3 and a remainder of 265.
Write down 3 as next digit of the result. 
Result so far: 77760.0573643
The remainder is 265 after subtracting 1935 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Going ahead to step 16:
645 goes into 2650 4 times with a remainder of 70.
Use 4 as the next digit of our solution. 
Result so far: 77760.05736434
The remainder is 70 after subtracting 2580 from 2650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 77760.05736434 with a balance of 7e-08.