78670837 ÷ 666 
Our goal is to divide 78670837 by 666.

Step 1:
666 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 666

Advancing to step 2:
666 goes into 78 0 times with a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Take the next digit (6) from the dividend and append it to 78, then repeat: 786 / 666

Step 3:
666 can be fit into 786 1 times, resulting in a remainder of 120.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 666 from 786 leaves us with 120.
Include the next digit (7) from the dividend after 120, then repeat: 1207 / 666

Going ahead to step 4:
When dividing 1207 by 666, we get 1 with a remainder of 541.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Deduct 666 from 1207 and we're left with 541.
Append the next digit (0) from the dividend to 541 and continue with: 5410 / 666

Going ahead to step 5:
666 can be fit into 5410 8 times, resulting in a remainder of 82.
Write down 8 as next digit of the result. 
Result so far: 118.0
Subtracting 5328 from 5410 leaves us with 82.
Bring next digit (8) of the dividend behind the 82 and repeat the process: 828 / 666

Step 6:
If we divide 828 by 666, we get 1 and a remainder of 162.
Put 1 as the next digit of the answer. 
Result so far: 1181.0
Deduct 666 from 828 and we're left with 162.
Bring next digit (3) of the dividend behind the 162 and repeat the process: 1623 / 666

Going ahead to step 7:
The number 666 fits into 1623 2 times, leaving a remainder of 291.
Record the quotient 2 as the next digit in the result. 
Result so far: 11812.0
If we take 1332 away from 1623, we end up with 291.
Include the next digit (7) from the dividend after 291, then repeat: 2917 / 666

On to step 8:
If we divide 2917 by 666, we get 4 and a remainder of 253.
Write down 4 as next digit of the result. 
Result so far: 118124.0
If we take 2664 away from 2917, we end up with 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Let's proceed to step 9:
When dividing 2530 by 666, we get 3 with a remainder of 532.
The number 3 becomes the next digit in our result. 
Result so far: 118124.3
Deduct 1998 from 2530 and we're left with 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Going ahead to step 10:
666 goes into 5320 7 times with a remainder of 658.
The number 7 becomes the next digit in our result. 
Result so far: 118124.37
The remainder is 658 after subtracting 4662 from 5320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

Step 11:
The number 666 fits into 6580 9 times, leaving a remainder of 586.
Use 9 as the next digit of our solution. 
Result so far: 118124.379
If we take 5994 away from 6580, we end up with 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Moving on to step 12:
When dividing 5860 by 666, we get 8 with a remainder of 532.
Put 8 as the next digit of the answer. 
Result so far: 118124.3798
Deduct 5328 from 5860 and we're left with 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Step 13:
When dividing 5320 by 666, we get 7 with a remainder of 658.
The number 7 becomes the next digit in our result. 
Result so far: 118124.37987
Deduct 4662 from 5320 and we're left with 658.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

On to step 14:
666 goes into 6580 9 times with a remainder of 586.
The next digit of our result is 9. 
Result so far: 118124.379879
If we take 5994 away from 6580, we end up with 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Advancing to step 15:
666 goes into 5860 8 times with a remainder of 532.
Use 8 as the next digit of our solution. 
Result so far: 118124.3798798
If we subtract 5328 from 5860, we get 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Let's proceed to step 16:
666 goes into 5320 7 times with a remainder of 658.
Record the quotient 7 as the next digit in the result. 
Result so far: 118124.37987987
Deduct 4662 from 5320 and we're left with 658.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

The final result is 118124.37987987 with a remainder of 6.58e-07.