50079382 ÷ 644 
We're looking to find how many times 644 goes into 50079382.

Going ahead to step 1:
644 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 644

Advancing to step 2:
50 divided by 644 is 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 50 after subtracting 0 from 50.
Fetch the next digit (0) from the dividend, attach it to 50 and continue: 500 / 644

Moving on to step 3:
644 goes into 500 0 times with a remainder of 500.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 500, we end up with 500.
Take the next digit (7) from the dividend and append it to 500, then repeat: 5007 / 644

Let's proceed to step 4:
The number 644 fits into 5007 7 times, leaving a remainder of 499.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 499 after subtracting 4508 from 5007.
Append the next digit (9) from the dividend to 499 and continue with: 4999 / 644

Moving on to step 5:
When dividing 4999 by 644, we get 7 with a remainder of 491.
Put 7 as the next digit of the answer. 
Result so far: 77.0
If we take 4508 away from 4999, we end up with 491.
Fetch the next digit (3) from the dividend, attach it to 491 and continue: 4913 / 644

Let's proceed to step 6:
644 goes into 4913 7 times with a remainder of 405.
Record the quotient 7 as the next digit in the result. 
Result so far: 777.0
Deduct 4508 from 4913 and we're left with 405.
Grab the next digit (8) from the dividend, add it to 405, then carry on: 4058 / 644

Going ahead to step 7:
644 can be fit into 4058 6 times, resulting in a remainder of 194.
Put 6 as the next digit of the answer. 
Result so far: 7776.0
Subtract 3864 from 4058 to get 194.
Bring next digit (2) of the dividend behind the 194 and repeat the process: 1942 / 644

Step 8:
1942 divided by 644 is 3 with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 77763.0
The remainder is 10 after subtracting 1932 from 1942.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
When dividing 100 by 644, we get 0 with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 77763.0
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 10:
The number 644 fits into 1000 1 times, leaving a remainder of 356.
The number 1 becomes the next digit in our result. 
Result so far: 77763.01
If we take 644 away from 1000, we end up with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Advancing to step 11:
If we divide 3560 by 644, we get 5 and a remainder of 340.
The number 5 becomes the next digit in our result. 
Result so far: 77763.015
If we subtract 3220 from 3560, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 12:
644 can be fit into 3400 5 times, resulting in a remainder of 180.
The next digit of our result is 5. 
Result so far: 77763.0155
Subtracting 3220 from 3400 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

The final result is 77763.0155 with a remainder of 0.0018.