We divide 13689945 by 660
We're looking to find how many times 660 goes into 13689945.

Step 1:
When dividing 1 by 660, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 660

Let's proceed to step 2:
The number 660 fits into 13 0 times, leaving a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Take the next digit (6) from the dividend and append it to 13, then repeat: 136 / 660

Let's proceed to step 3:
136 divided by 660 is 0 with a remainder of 136.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 136 after subtracting 0 from 136.
Bring next digit (8) of the dividend behind the 136 and repeat the process: 1368 / 660

On to step 4:
660 can be fit into 1368 2 times, resulting in a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 1320 from 1368 and we're left with 48.
Bring next digit (9) of the dividend behind the 48 and repeat the process: 489 / 660

Moving on to step 5:
The number 660 fits into 489 0 times, leaving a remainder of 489.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Subtracting 0 from 489 leaves us with 489.
Grab the next digit (9) from the dividend, add it to 489, then carry on: 4899 / 660

Going ahead to step 6:
If we divide 4899 by 660, we get 7 and a remainder of 279.
Record the quotient 7 as the next digit in the result. 
Result so far: 207.0
Deduct 4620 from 4899 and we're left with 279.
Bring next digit (4) of the dividend behind the 279 and repeat the process: 2794 / 660

Moving on to step 7:
660 can be fit into 2794 4 times, resulting in a remainder of 154.
Record the quotient 4 as the next digit in the result. 
Result so far: 2074.0
If we subtract 2640 from 2794, we get 154.
Append the next digit (5) from the dividend to 154 and continue with: 1545 / 660

Moving on to step 8:
660 goes into 1545 2 times with a remainder of 225.
Use 2 as the next digit of our solution. 
Result so far: 20742.0
If we subtract 1320 from 1545, we get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Step 9:
660 goes into 2250 3 times with a remainder of 270.
Write down 3 as next digit of the result. 
Result so far: 20742.3
Deduct 1980 from 2250 and we're left with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 10:
When dividing 2700 by 660, we get 4 with a remainder of 60.
The number 4 becomes the next digit in our result. 
Result so far: 20742.34
The remainder is 60 after subtracting 2640 from 2700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 11:
The number 660 fits into 600 0 times, leaving a remainder of 600.
Put 0 as the next digit of the answer. 
Result so far: 20742.34
Deduct 0 from 600 and we're left with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Advancing to step 12:
6000 divided by 660 is 9 with a remainder of 60.
Put 9 as the next digit of the answer. 
Result so far: 20742.3409
Subtract 5940 from 6000 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 13:
If we divide 600 by 660, we get 0 and a remainder of 600.
The number 0 becomes the next digit in our result. 
Result so far: 20742.3409
If we take 0 away from 600, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Step 14:
When dividing 6000 by 660, we get 9 with a remainder of 60.
The number 9 becomes the next digit in our result. 
Result so far: 20742.340909
Subtract 5940 from 6000 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 15:
660 goes into 600 0 times with a remainder of 600.
Put 0 as the next digit of the answer. 
Result so far: 20742.340909
If we subtract 0 from 600, we get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 16:
When dividing 6000 by 660, we get 9 with a remainder of 60.
The next digit of our result is 9. 
Result so far: 20742.34090909
The remainder is 60 after subtracting 5940 from 6000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 20742.34090909 and a remainder of 6e-08.