We're dividing 78666637 by 109 
We want to figure out the number of times 78666637 can be divided by 109.

Advancing to step 1:
When dividing 7 by 109, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 109

Going ahead to step 2:
109 goes into 78 0 times with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Bring next digit (6) of the dividend behind the 78 and repeat the process: 786 / 109

Going ahead to step 3:
The number 109 fits into 786 7 times, leaving a remainder of 23.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 763 from 786, we get 23.
Take the next digit (6) from the dividend and append it to 23, then repeat: 236 / 109

Let's proceed to step 4:
109 can be fit into 236 2 times, resulting in a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
Subtract 218 from 236 to get 18.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 109

Advancing to step 5:
109 can be fit into 186 1 times, resulting in a remainder of 77.
Use 1 as the next digit of our solution. 
Result so far: 721.0
The remainder is 77 after subtracting 109 from 186.
Bring next digit (6) of the dividend behind the 77 and repeat the process: 776 / 109

Moving on to step 6:
109 can be fit into 776 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 7217.0
Subtract 763 from 776 to get 13.
Fetch the next digit (3) from the dividend, attach it to 13 and continue: 133 / 109

Advancing to step 7:
109 can be fit into 133 1 times, resulting in a remainder of 24.
Put 1 as the next digit of the answer. 
Result so far: 72171.0
If we take 109 away from 133, we end up with 24.
Fetch the next digit (7) from the dividend, attach it to 24 and continue: 247 / 109

Going ahead to step 8:
The number 109 fits into 247 2 times, leaving a remainder of 29.
Use 2 as the next digit of our solution. 
Result so far: 721712.0
Deduct 218 from 247 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 9:
109 can be fit into 290 2 times, resulting in a remainder of 72.
Use 2 as the next digit of our solution. 
Result so far: 721712.2
Deduct 218 from 290 and we're left 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.

Step 10:
109 goes into 720 6 times with a remainder of 66.
The next digit of our result is 6. 
Result so far: 721712.26
The remainder is 66 after subtracting 654 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 11:
109 can be fit into 660 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 721712.266
The remainder is 6 after subtracting 654 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Our division results in 721712.266 with a remaining 0.0006.