We look at the division of 19539593 by 669 
We want to figure out the number of times 19539593 can be divided by 669.

On to step 1:
1 divided by 669 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 669

On to step 2:
669 can be fit into 19 0 times, resulting in a remainder of 19.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 19, we get 19.
Take the next digit (5) from the dividend and append it to 19, then repeat: 195 / 669

Advancing to step 3:
When dividing 195 by 669, we get 0 with a remainder of 195.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 195 leaves us with 195.
Take the next digit (3) from the dividend and append it to 195, then repeat: 1953 / 669

Moving on to step 4:
669 can be fit into 1953 2 times, resulting in a remainder of 615.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1338 from 1953 leaves us with 615.
Bring next digit (9) of the dividend behind the 615 and repeat the process: 6159 / 669

Going ahead to step 5:
The number 669 fits into 6159 9 times, leaving a remainder of 138.
The next digit of our result is 9. 
Result so far: 29.0
Deduct 6021 from 6159 and we're left with 138.
Grab the next digit (5) from the dividend, add it to 138, then carry on: 1385 / 669

Going ahead to step 6:
The number 669 fits into 1385 2 times, leaving a remainder of 47.
The next digit of our result is 2. 
Result so far: 292.0
Subtracting 1338 from 1385 leaves us with 47.
Grab the next digit (9) from the dividend, add it to 47, then carry on: 479 / 669

Let's proceed to step 7:
When dividing 479 by 669, we get 0 with a remainder of 479.
Put 0 as the next digit of the answer. 
Result so far: 2920.0
Deduct 0 from 479 and we're left with 479.
Grab the next digit (3) from the dividend, add it to 479, then carry on: 4793 / 669

Let's proceed to step 8:
669 goes into 4793 7 times with a remainder of 110.
Use 7 as the next digit of our solution. 
Result so far: 29207.0
Subtracting 4683 from 4793 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 9:
1100 divided by 669 is 1 with a remainder of 431.
The next digit of our result is 1. 
Result so far: 29207.1
Subtracting 669 from 1100 leaves us with 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Moving on to step 10:
4310 divided by 669 is 6 with a remainder of 296.
Write down 6 as next digit of the result. 
Result so far: 29207.16
Subtracting 4014 from 4310 leaves us with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 11:
669 can be fit into 2960 4 times, resulting in a remainder of 284.
Record the quotient 4 as the next digit in the result. 
Result so far: 29207.164
Subtracting 2676 from 2960 leaves us with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Advancing to step 12:
2840 divided by 669 is 4 with a remainder of 164.
Use 4 as the next digit of our solution. 
Result so far: 29207.1644
Subtract 2676 from 2840 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

The final result is 29207.1644 with a remainder of 0.00164.