Let's divide 39054169 by 645
Our goal is to divide 39054169 by 645.

Moving on to step 1:
645 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 645

On to step 2:
39 divided by 645 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Take the next digit (0) from the dividend and append it to 39, then repeat: 390 / 645

Advancing to step 3:
The number 645 fits into 390 0 times, leaving a remainder of 390.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 390 leaves us with 390.
Grab the next digit (5) from the dividend, add it to 390, then carry on: 3905 / 645

Step 4:
The number 645 fits into 3905 6 times, leaving a remainder of 35.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 3870 from 3905 and we're left with 35.
Bring next digit (4) of the dividend behind the 35 and repeat the process: 354 / 645

Step 5:
645 goes into 354 0 times with a remainder of 354.
Record the quotient 0 as the next digit in the result. 
Result so far: 60.0
The remainder is 354 after subtracting 0 from 354.
Bring next digit (1) of the dividend behind the 354 and repeat the process: 3541 / 645

Step 6:
3541 divided by 645 is 5 with a remainder of 316.
The number 5 becomes the next digit in our result. 
Result so far: 605.0
If we take 3225 away from 3541, we end up with 316.
Take the next digit (6) from the dividend and append it to 316, then repeat: 3166 / 645

On to step 7:
645 can be fit into 3166 4 times, resulting in a remainder of 586.
Put 4 as the next digit of the answer. 
Result so far: 6054.0
The remainder is 586 after subtracting 2580 from 3166.
Grab the next digit (9) from the dividend, add it to 586, then carry on: 5869 / 645

Moving on to step 8:
645 can be fit into 5869 9 times, resulting in a remainder of 64.
The number 9 becomes the next digit in our result. 
Result so far: 60549.0
Deduct 5805 from 5869 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 9:
When dividing 640 by 645, we get 0 with a remainder of 640.
Write down 0 as next digit of the result. 
Result so far: 60549.0
Subtracting 0 from 640 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

On to step 10:
When dividing 6400 by 645, we get 9 with a remainder of 595.
Write down 9 as next digit of the result. 
Result so far: 60549.09
Subtract 5805 from 6400 to get 595.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

Going ahead to step 11:
The number 645 fits into 5950 9 times, leaving a remainder of 145.
The number 9 becomes the next digit in our result. 
Result so far: 60549.099
Deduct 5805 from 5950 and we're left with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

The final result is 60549.099 with a remainder of 0.0145.