66938259 ÷ 689 
We want to figure out the number of times 66938259 can be divided by 689.

Let's proceed to step 1:
If we divide 6 by 689, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 689

Going ahead to step 2:
If we divide 66 by 689, we get 0 and a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 689

Moving on to step 3:
When dividing 669 by 689, we get 0 with a remainder of 669.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 669, we get 669.
Fetch the next digit (3) from the dividend, attach it to 669 and continue: 6693 / 689

Let's proceed to step 4:
If we divide 6693 by 689, we get 9 and a remainder of 492.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 6201 from 6693 and we're left with 492.
Bring next digit (8) of the dividend behind the 492 and repeat the process: 4928 / 689

Moving on to step 5:
The number 689 fits into 4928 7 times, leaving a remainder of 105.
Put 7 as the next digit of the answer. 
Result so far: 97.0
Subtracting 4823 from 4928 leaves us with 105.
Grab the next digit (2) from the dividend, add it to 105, then carry on: 1052 / 689

Moving on to step 6:
1052 divided by 689 is 1 with a remainder of 363.
Write down 1 as next digit of the result. 
Result so far: 971.0
If we subtract 689 from 1052, we get 363.
Grab the next digit (5) from the dividend, add it to 363, then carry on: 3635 / 689

Step 7:
The number 689 fits into 3635 5 times, leaving a remainder of 190.
The next digit of our result is 5. 
Result so far: 9715.0
Subtract 3445 from 3635 to get 190.
Take the next digit (9) from the dividend and append it to 190, then repeat: 1909 / 689

Going ahead to step 8:
If we divide 1909 by 689, we get 2 and a remainder of 531.
Use 2 as the next digit of our solution. 
Result so far: 97152.0
Subtracting 1378 from 1909 leaves us with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Let's proceed to step 9:
If we divide 5310 by 689, we get 7 and a remainder of 487.
Use 7 as the next digit of our solution. 
Result so far: 97152.7
The remainder is 487 after subtracting 4823 from 5310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

Moving on to step 10:
689 goes into 4870 7 times with a remainder of 47.
Use 7 as the next digit of our solution. 
Result so far: 97152.77
The remainder is 47 after subtracting 4823 from 4870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The final result is 97152.77 with a remainder of 0.047.