66557709 divided by 13 
Let's see how many times 13 fits into 66557709.

Step 1:
If we divide 6 by 13, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 13

Going ahead to step 2:
13 goes into 66 5 times with a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we subtract 65 from 66, we get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 13

On to step 3:
13 goes into 15 1 times with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 51.0
Subtracting 13 from 15 leaves us with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 13

Let's proceed to step 4:
13 goes into 25 1 times with a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 511.0
If we take 13 away from 25, we end up with 12.
Take the next digit (7) from the dividend and append it to 12, then repeat: 127 / 13

Let's proceed to step 5:
The number 13 fits into 127 9 times, leaving a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 5119.0
The remainder is 10 after subtracting 117 from 127.
Grab the next digit (7) from the dividend, add it to 10, then carry on: 107 / 13

Moving on to step 6:
The number 13 fits into 107 8 times, leaving a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 51198.0
If we take 104 away from 107, we end up with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 13

Advancing to step 7:
The number 13 fits into 30 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 511982.0
Subtract 26 from 30 to get 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 13

Going ahead to step 8:
If we divide 49 by 13, we get 3 and a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 5119823.0
Deduct 39 from 49 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
100 divided by 13 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 5119823.7
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 10:
13 goes into 90 6 times with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 5119823.76
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 11:
120 divided by 13 is 9 with a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 5119823.769
If we subtract 117 from 120, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 12:
13 goes into 30 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 5119823.7692
Subtract 26 from 30 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 13:
When dividing 40 by 13, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 5119823.76923
If we subtract 39 from 40, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 14:
The number 13 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 5119823.76923
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 15:
100 divided by 13 is 7 with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 5119823.7692307
Deduct 91 from 100 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 16:
If we divide 90 by 13, we get 6 and a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 5119823.76923076
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 5119823.76923076 and a remainder of 1.2e-08.