We look at the division of 87800407 by 13 
We want to figure out the number of times 87800407 can be divided by 13.

Moving on to step 1:
8 divided by 13 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 13

Advancing to step 2:
13 can be fit into 87 6 times, resulting in a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 78 away from 87, we end up with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 13

Let's proceed to step 3:
If we divide 98 by 13, we get 7 and a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 67.0
Subtracting 91 from 98 leaves us with 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 13

Advancing to step 4:
When dividing 70 by 13, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 675.0
The remainder is 5 after subtracting 65 from 70.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 13

Advancing to step 5:
50 divided by 13 is 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 6753.0
Subtracting 39 from 50 leaves us with 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 13

On to step 6:
When dividing 114 by 13, we get 8 with a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 67538.0
If we take 104 away from 114, we end up with 10.
Append the next digit (0) from the dividend to 10 and continue with: 100 / 13

Advancing to step 7:
The number 13 fits into 100 7 times, leaving a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 675387.0
Deduct 91 from 100 and we're left with 9.
Fetch the next digit (7) from the dividend, attach it to 9 and continue: 97 / 13

Moving on to step 8:
The number 13 fits into 97 7 times, leaving a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 6753877.0
Subtract 91 from 97 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 9:
If we divide 60 by 13, we get 4 and a remainder of 8.
The next digit of our result is 4. 
Result so far: 6753877.4
Subtract 52 from 60 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 10:
13 can be fit into 80 6 times, resulting in a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 6753877.46
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.

Step 11:
When dividing 20 by 13, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 6753877.461
The remainder is 7 after subtracting 13 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 12:
If we divide 70 by 13, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 6753877.4615
Deduct 65 from 70 and we're left 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 13:
When dividing 50 by 13, we get 3 with a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 6753877.46153
Subtract 39 from 50 to get 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 14:
13 goes into 110 8 times with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 6753877.461538
The remainder is 6 after subtracting 104 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 15:
13 goes into 60 4 times with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 6753877.4615384
If we take 52 away from 60, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 16:
80 divided by 13 is 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 6753877.46153846
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.

The final result is 6753877.46153846 with a remainder of 2e-09.