66801315 ÷ 635 
We're looking to find how many times 635 goes into 66801315.

Step 1:
If we divide 6 by 635, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 635

On to step 2:
635 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Append the next digit (8) from the dividend to 66 and continue with: 668 / 635

Step 3:
When dividing 668 by 635, we get 1 with a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 635 from 668, we get 33.
Grab the next digit (0) from the dividend, add it to 33, then carry on: 330 / 635

Advancing to step 4:
635 can be fit into 330 0 times, resulting in a remainder of 330.
Write down 0 as next digit of the result. 
Result so far: 10.0
Deduct 0 from 330 and we're left with 330.
Append the next digit (1) from the dividend to 330 and continue with: 3301 / 635

Going ahead to step 5:
When dividing 3301 by 635, we get 5 with a remainder of 126.
The next digit of our result is 5. 
Result so far: 105.0
Deduct 3175 from 3301 and we're left with 126.
Grab the next digit (3) from the dividend, add it to 126, then carry on: 1263 / 635

Let's proceed to step 6:
If we divide 1263 by 635, we get 1 and a remainder of 628.
Put 1 as the next digit of the answer. 
Result so far: 1051.0
Subtracting 635 from 1263 leaves us with 628.
Fetch the next digit (1) from the dividend, attach it to 628 and continue: 6281 / 635

Moving on to step 7:
6281 divided by 635 is 9 with a remainder of 566.
Use 9 as the next digit of our solution. 
Result so far: 10519.0
The remainder is 566 after subtracting 5715 from 6281.
Append the next digit (5) from the dividend to 566 and continue with: 5665 / 635

Step 8:
When dividing 5665 by 635, we get 8 with a remainder of 585.
The next digit of our result is 8. 
Result so far: 105198.0
If we take 5080 away from 5665, we end up with 585.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Moving on to step 9:
When dividing 5850 by 635, we get 9 with a remainder of 135.
The next digit of our result is 9. 
Result so far: 105198.9
If we take 5715 away from 5850, we end up with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Going ahead to step 10:
635 can be fit into 1350 2 times, resulting in a remainder of 80.
Record the quotient 2 as the next digit in the result. 
Result so far: 105198.92
The remainder is 80 after subtracting 1270 from 1350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 11:
If we divide 800 by 635, we get 1 and a remainder of 165.
Write down 1 as next digit of the result. 
Result so far: 105198.921
If we subtract 635 from 800, we get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 12:
635 goes into 1650 2 times with a remainder of 380.
The number 2 becomes the next digit in our result. 
Result so far: 105198.9212
If we subtract 1270 from 1650, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 13:
The number 635 fits into 3800 5 times, leaving a remainder of 625.
Write down 5 as next digit of the result. 
Result so far: 105198.92125
If we subtract 3175 from 3800, we get 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Step 14:
If we divide 6250 by 635, we get 9 and a remainder of 535.
The next digit of our result is 9. 
Result so far: 105198.921259
If we subtract 5715 from 6250, we get 535.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

Step 15:
When dividing 5350 by 635, we get 8 with a remainder of 270.
Use 8 as the next digit of our solution. 
Result so far: 105198.9212598
Deduct 5080 from 5350 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.

Going ahead to step 16:
2700 divided by 635 is 4 with a remainder of 160.
Record the quotient 4 as the next digit in the result. 
Result so far: 105198.92125984
Deduct 2540 from 2700 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

In conclusion, the division gives 105198.92125984 with a balance of 1.6e-07.