We look at the division of 45186989 by 25 
We want to divide 45186989 by 25.

Advancing to step 1:
25 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 25

Let's proceed to step 2:
45 divided by 25 is 1 with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 25 away from 45, we end up with 20.
Grab the next digit (1) from the dividend, add it to 20, then carry on: 201 / 25

Moving on to step 3:
201 divided by 25 is 8 with a remainder of 1.
The next digit of our result is 8. 
Result so far: 18.0
Deduct 200 from 201 and we're left with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 25

Let's proceed to step 4:
The number 25 fits into 18 0 times, leaving a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 180.0
The remainder is 18 after subtracting 0 from 18.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 25

Let's proceed to step 5:
When dividing 186 by 25, we get 7 with a remainder of 11.
The next digit of our result is 7. 
Result so far: 1807.0
Subtracting 175 from 186 leaves us with 11.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 25

Step 6:
25 can be fit into 119 4 times, resulting in a remainder of 19.
Put 4 as the next digit of the answer. 
Result so far: 18074.0
If we subtract 100 from 119, we get 19.
Grab the next digit (8) from the dividend, add it to 19, then carry on: 198 / 25

Moving on to step 7:
If we divide 198 by 25, we get 7 and a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 180747.0
The remainder is 23 after subtracting 175 from 198.
Append the next digit (9) from the dividend to 23 and continue with: 239 / 25

Going ahead to step 8:
25 goes into 239 9 times with a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 1807479.0
Deduct 225 from 239 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 9:
25 can be fit into 140 5 times, resulting in a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 1807479.5
Subtracting 125 from 140 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 10:
If we divide 150 by 25, we get 6 and a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 1807479.56
If we subtract 150 from 150, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
25 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1807479.56
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 12:
0 divided by 25 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1807479.56
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 1807479.56 and a remainder of 0.0.