66146977 ÷ 680 
Our goal is to divide 66146977 by 680.

Moving on to step 1:
If we divide 6 by 680, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 680

On to step 2:
If we divide 66 by 680, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Include the next digit (1) from the dividend after 66, then repeat: 661 / 680

On to step 3:
The number 680 fits into 661 0 times, leaving a remainder of 661.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 661, we get 661.
Bring next digit (4) of the dividend behind the 661 and repeat the process: 6614 / 680

Let's proceed to step 4:
The number 680 fits into 6614 9 times, leaving a remainder of 494.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 6120 from 6614 and we're left with 494.
Append the next digit (6) from the dividend to 494 and continue with: 4946 / 680

Going ahead to step 5:
The number 680 fits into 4946 7 times, leaving a remainder of 186.
Put 7 as the next digit of the answer. 
Result so far: 97.0
Subtract 4760 from 4946 to get 186.
Grab the next digit (9) from the dividend, add it to 186, then carry on: 1869 / 680

Advancing to step 6:
680 can be fit into 1869 2 times, resulting in a remainder of 509.
Record the quotient 2 as the next digit in the result. 
Result so far: 972.0
If we take 1360 away from 1869, we end up with 509.
Append the next digit (7) from the dividend to 509 and continue with: 5097 / 680

Step 7:
680 goes into 5097 7 times with a remainder of 337.
Write down 7 as next digit of the result. 
Result so far: 9727.0
Deduct 4760 from 5097 and we're left with 337.
Fetch the next digit (7) from the dividend, attach it to 337 and continue: 3377 / 680

Let's proceed to step 8:
680 goes into 3377 4 times with a remainder of 657.
The next digit of our result is 4. 
Result so far: 97274.0
Subtracting 2720 from 3377 leaves us with 657.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6570, and continue the process.

Let's proceed to step 9:
When dividing 6570 by 680, we get 9 with a remainder of 450.
Use 9 as the next digit of our solution. 
Result so far: 97274.9
The remainder is 450 after subtracting 6120 from 6570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

On to step 10:
4500 divided by 680 is 6 with a remainder of 420.
The next digit of our result is 6. 
Result so far: 97274.96
If we take 4080 away from 4500, we end up with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Advancing to step 11:
When dividing 4200 by 680, we get 6 with a remainder of 120.
Write down 6 as next digit of the result. 
Result so far: 97274.966
If we subtract 4080 from 4200, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

After the division, we end up with 97274.966 and a remainder of 0.012.