We're dividing 66541561 by 13 
Let's see how many times 13 fits into 66541561.

Going ahead to step 1:
13 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 13

Let's proceed to step 2:
If we divide 66 by 13, we get 5 and a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 65 from 66 leaves us with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 13

On to step 3:
If we divide 15 by 13, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 51.0
Deduct 13 from 15 and we're left with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 13

Step 4:
24 divided by 13 is 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 511.0
The remainder is 11 after subtracting 13 from 24.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 13

Advancing to step 5:
The number 13 fits into 111 8 times, leaving a remainder of 7.
Write down 8 as next digit of the result. 
Result so far: 5118.0
Deduct 104 from 111 and we're left with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 13

Moving on to step 6:
The number 13 fits into 75 5 times, leaving a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 51185.0
Deduct 65 from 75 and we're left with 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 13

Going ahead to step 7:
When dividing 106 by 13, we get 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 511858.0
If we subtract 104 from 106, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 13

Step 8:
21 divided by 13 is 1 with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 5118581.0
Subtract 13 from 21 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
If we divide 80 by 13, we get 6 and a remainder of 2.
The next digit of our result is 6. 
Result so far: 5118581.6
If we subtract 78 from 80, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
20 divided by 13 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 5118581.61
Subtract 13 from 20 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 11:
13 goes into 70 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 5118581.615
If we take 65 away from 70, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 12:
The number 13 fits into 50 3 times, leaving a remainder of 11.
The next digit of our result is 3. 
Result so far: 5118581.6153
Subtracting 39 from 50 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
The number 13 fits into 110 8 times, leaving a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 5118581.61538
If we take 104 away from 110, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 14:
13 goes into 60 4 times with a remainder of 8.
The next digit of our result is 4. 
Result so far: 5118581.615384
If we subtract 52 from 60, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 15:
When dividing 80 by 13, we get 6 with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 5118581.6153846
The remainder is 2 after subtracting 78 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 16:
13 goes into 20 1 times with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 5118581.61538461
Deduct 13 from 20 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

In conclusion, the division gives 5118581.61538461 with a balance of 7e-09.