We look at the division of 79757374 by 638 
We want to figure out the number of times 79757374 can be divided by 638.

Let's proceed to step 1:
638 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 638

Let's proceed to step 2:
79 divided by 638 is 0 with a remainder of 79.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Take the next digit (7) from the dividend and append it to 79, then repeat: 797 / 638

On to step 3:
The number 638 fits into 797 1 times, leaving a remainder of 159.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 638 away from 797, we end up with 159.
Grab the next digit (5) from the dividend, add it to 159, then carry on: 1595 / 638

Let's proceed to step 4:
1595 divided by 638 is 2 with a remainder of 319.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we subtract 1276 from 1595, we get 319.
Append the next digit (7) from the dividend to 319 and continue with: 3197 / 638

Moving on to step 5:
638 goes into 3197 5 times with a remainder of 7.
The next digit of our result is 5. 
Result so far: 125.0
If we take 3190 away from 3197, we end up with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 638

Let's proceed to step 6:
73 divided by 638 is 0 with a remainder of 73.
Write down 0 as next digit of the result. 
Result so far: 1250.0
If we take 0 away from 73, we end up with 73.
Take the next digit (7) from the dividend and append it to 73, then repeat: 737 / 638

Let's proceed to step 7:
When dividing 737 by 638, we get 1 with a remainder of 99.
Use 1 as the next digit of our solution. 
Result so far: 12501.0
Subtracting 638 from 737 leaves us with 99.
Bring next digit (4) of the dividend behind the 99 and repeat the process: 994 / 638

Advancing to step 8:
638 can be fit into 994 1 times, resulting in a remainder of 356.
Use 1 as the next digit of our solution. 
Result so far: 125011.0
Subtracting 638 from 994 leaves us 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 9:
If we divide 3560 by 638, we get 5 and a remainder of 370.
Write down 5 as next digit of the result. 
Result so far: 125011.5
The remainder is 370 after subtracting 3190 from 3560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 10:
The number 638 fits into 3700 5 times, leaving a remainder of 510.
Use 5 as the next digit of our solution. 
Result so far: 125011.55
Subtracting 3190 from 3700 leaves us with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

The final result is 125011.55 with a remainder of 0.51.