We're dividing 12986997 by 609 
Let's see how many times 609 fits into 12986997.

Step 1:
1 divided by 609 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 609

Going ahead to step 2:
609 goes into 12 0 times with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 609

Advancing to step 3:
129 divided by 609 is 0 with a remainder of 129.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 129 leaves us with 129.
Take the next digit (8) from the dividend and append it to 129, then repeat: 1298 / 609

On to step 4:
609 goes into 1298 2 times with a remainder of 80.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 1218 away from 1298, we end up with 80.
Take the next digit (6) from the dividend and append it to 80, then repeat: 806 / 609

Advancing to step 5:
If we divide 806 by 609, we get 1 and a remainder of 197.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Subtracting 609 from 806 leaves us with 197.
Take the next digit (9) from the dividend and append it to 197, then repeat: 1979 / 609

Moving on to step 6:
When dividing 1979 by 609, we get 3 with a remainder of 152.
Put 3 as the next digit of the answer. 
Result so far: 213.0
Deduct 1827 from 1979 and we're left with 152.
Bring next digit (9) of the dividend behind the 152 and repeat the process: 1529 / 609

Advancing to step 7:
1529 divided by 609 is 2 with a remainder of 311.
Write down 2 as next digit of the result. 
Result so far: 2132.0
The remainder is 311 after subtracting 1218 from 1529.
Take the next digit (7) from the dividend and append it to 311, then repeat: 3117 / 609

Moving on to step 8:
609 can be fit into 3117 5 times, resulting in a remainder of 72.
Use 5 as the next digit of our solution. 
Result so far: 21325.0
If we take 3045 away from 3117, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 9:
720 divided by 609 is 1 with a remainder of 111.
The next digit of our result is 1. 
Result so far: 21325.1
The remainder is 111 after subtracting 609 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Step 10:
When dividing 1110 by 609, we get 1 with a remainder of 501.
The number 1 becomes the next digit in our result. 
Result so far: 21325.11
If we take 609 away from 1110, we end up with 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

After the division, we end up with 21325.11 and a remainder of 0.501.