13138629 ÷ 987 
Our goal is to divide 13138629 by 987.

Advancing to step 1:
987 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 987

Moving on to step 2:
987 goes into 13 0 times with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 987

Moving on to step 3:
If we divide 131 by 987, we get 0 and a remainder of 131.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 131 leaves us with 131.
Take the next digit (3) from the dividend and append it to 131, then repeat: 1313 / 987

Advancing to step 4:
The number 987 fits into 1313 1 times, leaving a remainder of 326.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 987 from 1313 to get 326.
Take the next digit (8) from the dividend and append it to 326, then repeat: 3268 / 987

Let's proceed to step 5:
The number 987 fits into 3268 3 times, leaving a remainder of 307.
The next digit of our result is 3. 
Result so far: 13.0
The remainder is 307 after subtracting 2961 from 3268.
Fetch the next digit (6) from the dividend, attach it to 307 and continue: 3076 / 987

On to step 6:
3076 divided by 987 is 3 with a remainder of 115.
The number 3 becomes the next digit in our result. 
Result so far: 133.0
Subtract 2961 from 3076 to get 115.
Fetch the next digit (2) from the dividend, attach it to 115 and continue: 1152 / 987

Step 7:
When dividing 1152 by 987, we get 1 with a remainder of 165.
Put 1 as the next digit of the answer. 
Result so far: 1331.0
Subtract 987 from 1152 to get 165.
Take the next digit (9) from the dividend and append it to 165, then repeat: 1659 / 987

Let's proceed to step 8:
When dividing 1659 by 987, we get 1 with a remainder of 672.
Put 1 as the next digit of the answer. 
Result so far: 13311.0
If we take 987 away from 1659, we end up with 672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

Moving on to step 9:
If we divide 6720 by 987, we get 6 and a remainder of 798.
Write down 6 as next digit of the result. 
Result so far: 13311.6
Subtract 5922 from 6720 to get 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

Advancing to step 10:
987 can be fit into 7980 8 times, resulting in a remainder of 84.
The number 8 becomes the next digit in our result. 
Result so far: 13311.68
If we subtract 7896 from 7980, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 11:
When dividing 840 by 987, we get 0 with a remainder of 840.
Write down 0 as next digit of the result. 
Result so far: 13311.68
If we subtract 0 from 840, we get 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Step 12:
8400 divided by 987 is 8 with a remainder of 504.
Record the quotient 8 as the next digit in the result. 
Result so far: 13311.6808
Subtracting 7896 from 8400 leaves us with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Advancing to step 13:
When dividing 5040 by 987, we get 5 with a remainder of 105.
Write down 5 as next digit of the result. 
Result so far: 13311.68085
If we take 4935 away from 5040, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Advancing to step 14:
987 goes into 1050 1 times with a remainder of 63.
The number 1 becomes the next digit in our result. 
Result so far: 13311.680851
If we take 987 away from 1050, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 15:
When dividing 630 by 987, we get 0 with a remainder of 630.
The number 0 becomes the next digit in our result. 
Result so far: 13311.680851
If we take 0 away from 630, we end up with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Let's proceed to step 16:
The number 987 fits into 6300 6 times, leaving a remainder of 378.
The number 6 becomes the next digit in our result. 
Result so far: 13311.68085106
Subtract 5922 from 6300 to get 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

In conclusion, the division gives 13311.68085106 with a balance of 3.78e-07.