We look at the division of 16604600 by 645 
Our goal is to divide 16604600 by 645.

Step 1:
645 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 645

Let's proceed to step 2:
16 divided by 645 is 0 with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 645

Let's proceed to step 3:
166 divided by 645 is 0 with a remainder of 166.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 166 leaves us with 166.
Fetch the next digit (0) from the dividend, attach it to 166 and continue: 1660 / 645

Let's proceed to step 4:
1660 divided by 645 is 2 with a remainder of 370.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 370 after subtracting 1290 from 1660.
Fetch the next digit (4) from the dividend, attach it to 370 and continue: 3704 / 645

On to step 5:
645 goes into 3704 5 times with a remainder of 479.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtract 3225 from 3704 to get 479.
Fetch the next digit (6) from the dividend, attach it to 479 and continue: 4796 / 645

Moving on to step 6:
The number 645 fits into 4796 7 times, leaving a remainder of 281.
Write down 7 as next digit of the result. 
Result so far: 257.0
If we subtract 4515 from 4796, we get 281.
Fetch the next digit (0) from the dividend, attach it to 281 and continue: 2810 / 645

Let's proceed to step 7:
645 goes into 2810 4 times with a remainder of 230.
Use 4 as the next digit of our solution. 
Result so far: 2574.0
Subtracting 2580 from 2810 leaves us with 230.
Fetch the next digit (0) from the dividend, attach it to 230 and continue: 2300 / 645

Let's proceed to step 8:
When dividing 2300 by 645, we get 3 with a remainder of 365.
Use 3 as the next digit of our solution. 
Result so far: 25743.0
Subtract 1935 from 2300 to get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Step 9:
When dividing 3650 by 645, we get 5 with a remainder of 425.
Write down 5 as next digit of the result. 
Result so far: 25743.5
The remainder is 425 after subtracting 3225 from 3650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Let's proceed to step 10:
The number 645 fits into 4250 6 times, leaving a remainder of 380.
Put 6 as the next digit of the answer. 
Result so far: 25743.56
Deduct 3870 from 4250 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 11:
645 can be fit into 3800 5 times, resulting in a remainder of 575.
Record the quotient 5 as the next digit in the result. 
Result so far: 25743.565
The remainder is 575 after subtracting 3225 from 3800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Going ahead to step 12:
645 goes into 5750 8 times with a remainder of 590.
The number 8 becomes the next digit in our result. 
Result so far: 25743.5658
Deduct 5160 from 5750 and we're left with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Let's proceed to step 13:
5900 divided by 645 is 9 with a remainder of 95.
Write down 9 as next digit of the result. 
Result so far: 25743.56589
If we take 5805 away from 5900, we end up with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Step 14:
If we divide 950 by 645, we get 1 and a remainder of 305.
Write down 1 as next digit of the result. 
Result so far: 25743.565891
The remainder is 305 after subtracting 645 from 950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Advancing to step 15:
3050 divided by 645 is 4 with a remainder of 470.
Write down 4 as next digit of the result. 
Result so far: 25743.5658914
If we subtract 2580 from 3050, we get 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Moving on to step 16:
The number 645 fits into 4700 7 times, leaving a remainder of 185.
Put 7 as the next digit of the answer. 
Result so far: 25743.56589147
If we take 4515 away from 4700, we end up with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

In conclusion, the division gives 25743.56589147 with a balance of 1.85e-07.