We look at the division of 19739812 by 129 
We want to figure out the number of times 19739812 can be divided by 129.

Let's proceed to step 1:
The number 129 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 129

Going ahead to step 2:
When dividing 19 by 129, we get 0 with a remainder of 19.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 19 after subtracting 0 from 19.
Bring next digit (7) of the dividend behind the 19 and repeat the process: 197 / 129

Let's proceed to step 3:
129 goes into 197 1 times with a remainder of 68.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 129 from 197 to get 68.
Take the next digit (3) from the dividend and append it to 68, then repeat: 683 / 129

Moving on to step 4:
129 can be fit into 683 5 times, resulting in a remainder of 38.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtracting 645 from 683 leaves us with 38.
Append the next digit (9) from the dividend to 38 and continue with: 389 / 129

Advancing to step 5:
The number 129 fits into 389 3 times, leaving a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 153.0
If we take 387 away from 389, we end up with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 129

Step 6:
129 can be fit into 28 0 times, resulting in a remainder of 28.
The number 0 becomes the next digit in our result. 
Result so far: 1530.0
If we take 0 away from 28, we end up with 28.
Grab the next digit (1) from the dividend, add it to 28, then carry on: 281 / 129

Step 7:
129 goes into 281 2 times with a remainder of 23.
Put 2 as the next digit of the answer. 
Result so far: 15302.0
If we subtract 258 from 281, we get 23.
Fetch the next digit (2) from the dividend, attach it to 23 and continue: 232 / 129

On to step 8:
When dividing 232 by 129, we get 1 with a remainder of 103.
Use 1 as the next digit of our solution. 
Result so far: 153021.0
Deduct 129 from 232 and we're left with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Going ahead to step 9:
129 goes into 1030 7 times with a remainder of 127.
Record the quotient 7 as the next digit in the result. 
Result so far: 153021.7
Deduct 903 from 1030 and we're left with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

On to step 10:
129 can be fit into 1270 9 times, resulting in a remainder of 109.
Write down 9 as next digit of the result. 
Result so far: 153021.79
Subtracting 1161 from 1270 leaves us with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Step 11:
129 goes into 1090 8 times with a remainder of 58.
Write down 8 as next digit of the result. 
Result so far: 153021.798
Deduct 1032 from 1090 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 12:
If we divide 580 by 129, we get 4 and a remainder of 64.
Write down 4 as next digit of the result. 
Result so far: 153021.7984
If we take 516 away from 580, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
When dividing 640 by 129, we get 4 with a remainder of 124.
Put 4 as the next digit of the answer. 
Result so far: 153021.79844
If we subtract 516 from 640, we get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Our division results in 153021.79844 with a remaining 0.000124.