66880743 ÷ 815 
We're looking to find how many times 815 goes into 66880743.

Step 1:
815 goes into 6 0 times with 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.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 815

Let's proceed to step 2:
66 divided by 815 is 0 with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Bring next digit (8) of the dividend behind the 66 and repeat the process: 668 / 815

Let's proceed to step 3:
815 can be fit into 668 0 times, resulting in a remainder of 668.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 668, we end up with 668.
Bring next digit (8) of the dividend behind the 668 and repeat the process: 6688 / 815

Advancing to step 4:
815 can be fit into 6688 8 times, resulting in a remainder of 168.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 6520 away from 6688, we end up with 168.
Take the next digit (0) from the dividend and append it to 168, then repeat: 1680 / 815

On to step 5:
1680 divided by 815 is 2 with a remainder of 50.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
If we subtract 1630 from 1680, we get 50.
Include the next digit (7) from the dividend after 50, then repeat: 507 / 815

Step 6:
815 can be fit into 507 0 times, resulting in a remainder of 507.
The number 0 becomes the next digit in our result. 
Result so far: 820.0
Subtract 0 from 507 to get 507.
Take the next digit (4) from the dividend and append it to 507, then repeat: 5074 / 815

Moving on to step 7:
5074 divided by 815 is 6 with a remainder of 184.
Write down 6 as next digit of the result. 
Result so far: 8206.0
If we take 4890 away from 5074, we end up with 184.
Fetch the next digit (3) from the dividend, attach it to 184 and continue: 1843 / 815

Advancing to step 8:
The number 815 fits into 1843 2 times, leaving a remainder of 213.
Write down 2 as next digit of the result. 
Result so far: 82062.0
If we subtract 1630 from 1843, we get 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Going ahead to step 9:
2130 divided by 815 is 2 with a remainder of 500.
Write down 2 as next digit of the result. 
Result so far: 82062.2
Deduct 1630 from 2130 and we're left with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Advancing to step 10:
If we divide 5000 by 815, we get 6 and a remainder of 110.
Put 6 as the next digit of the answer. 
Result so far: 82062.26
Subtracting 4890 from 5000 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 11:
If we divide 1100 by 815, we get 1 and a remainder of 285.
Use 1 as the next digit of our solution. 
Result so far: 82062.261
Subtract 815 from 1100 to get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

On to step 12:
When dividing 2850 by 815, we get 3 with a remainder of 405.
Write down 3 as next digit of the result. 
Result so far: 82062.2613
Deduct 2445 from 2850 and we're left with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Moving on to step 13:
The number 815 fits into 4050 4 times, leaving a remainder of 790.
Write down 4 as next digit of the result. 
Result so far: 82062.26134
Subtracting 3260 from 4050 leaves us with 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Advancing to step 14:
The number 815 fits into 7900 9 times, leaving a remainder of 565.
Write down 9 as next digit of the result. 
Result so far: 82062.261349
Subtracting 7335 from 7900 leaves us with 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Moving on to step 15:
815 can be fit into 5650 6 times, resulting in a remainder of 760.
Record the quotient 6 as the next digit in the result. 
Result so far: 82062.2613496
Deduct 4890 from 5650 and we're left with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Moving on to step 16:
The number 815 fits into 7600 9 times, leaving a remainder of 265.
Write down 9 as next digit of the result. 
Result so far: 82062.26134969
Subtracting 7335 from 7600 leaves us with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

In conclusion, the division gives 82062.26134969 with a balance of 2.65e-07.