We're dividing 25398645 by 491 
We want to figure out the number of times 25398645 can be divided by 491.

Step 1:
491 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 491

Advancing to step 2:
491 can be fit into 25 0 times, resulting in a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 25, we end up with 25.
Grab the next digit (3) from the dividend, add it to 25, then carry on: 253 / 491

Let's proceed to step 3:
491 can be fit into 253 0 times, resulting in a remainder of 253.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 253, we get 253.
Take the next digit (9) from the dividend and append it to 253, then repeat: 2539 / 491

Let's proceed to step 4:
491 can be fit into 2539 5 times, resulting in a remainder of 84.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 2455 from 2539, we get 84.
Append the next digit (8) from the dividend to 84 and continue with: 848 / 491

Advancing to step 5:
491 goes into 848 1 times with a remainder of 357.
Put 1 as the next digit of the answer. 
Result so far: 51.0
Subtract 491 from 848 to get 357.
Take the next digit (6) from the dividend and append it to 357, then repeat: 3576 / 491

Advancing to step 6:
When dividing 3576 by 491, we get 7 with a remainder of 139.
Write down 7 as next digit of the result. 
Result so far: 517.0
Deduct 3437 from 3576 and we're left with 139.
Bring next digit (4) of the dividend behind the 139 and repeat the process: 1394 / 491

Moving on to step 7:
When dividing 1394 by 491, we get 2 with a remainder of 412.
Record the quotient 2 as the next digit in the result. 
Result so far: 5172.0
Subtracting 982 from 1394 leaves us with 412.
Append the next digit (5) from the dividend to 412 and continue with: 4125 / 491

Step 8:
If we divide 4125 by 491, we get 8 and a remainder of 197.
Put 8 as the next digit of the answer. 
Result so far: 51728.0
Subtract 3928 from 4125 to get 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Moving on to step 9:
When dividing 1970 by 491, we get 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 51728.4
Subtracting 1964 from 1970 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 10:
The number 491 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 51728.4
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 11:
491 goes into 600 1 times with a remainder of 109.
The number 1 becomes the next digit in our result. 
Result so far: 51728.401
Subtracting 491 from 600 leaves us with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Advancing to step 12:
491 goes into 1090 2 times with a remainder of 108.
Use 2 as the next digit of our solution. 
Result so far: 51728.4012
Deduct 982 from 1090 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Moving on to step 13:
491 goes into 1080 2 times with a remainder of 98.
Write down 2 as next digit of the result. 
Result so far: 51728.40122
If we take 982 away from 1080, we end up with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

In conclusion, the division gives 51728.40122 with a balance of 9.8e-05.