81515407 ÷ 266 
We want to divide 81515407 by 266.

On to step 1:
If we divide 8 by 266, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 266

On to step 2:
If we divide 81 by 266, we get 0 and a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Include the next digit (5) from the dividend after 81, then repeat: 815 / 266

Advancing to step 3:
The number 266 fits into 815 3 times, leaving a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 798 from 815 and we're left with 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 266

Let's proceed to step 4:
266 can be fit into 171 0 times, resulting in a remainder of 171.
Put 0 as the next digit of the answer. 
Result so far: 30.0
If we subtract 0 from 171, we get 171.
Append the next digit (5) from the dividend to 171 and continue with: 1715 / 266

Step 5:
If we divide 1715 by 266, we get 6 and a remainder of 119.
The next digit of our result is 6. 
Result so far: 306.0
Deduct 1596 from 1715 and we're left with 119.
Bring next digit (4) of the dividend behind the 119 and repeat the process: 1194 / 266

Moving on to step 6:
If we divide 1194 by 266, we get 4 and a remainder of 130.
Put 4 as the next digit of the answer. 
Result so far: 3064.0
Subtracting 1064 from 1194 leaves us with 130.
Fetch the next digit (0) from the dividend, attach it to 130 and continue: 1300 / 266

Step 7:
If we divide 1300 by 266, we get 4 and a remainder of 236.
The next digit of our result is 4. 
Result so far: 30644.0
If we subtract 1064 from 1300, we get 236.
Include the next digit (7) from the dividend after 236, then repeat: 2367 / 266

Going ahead to step 8:
If we divide 2367 by 266, we get 8 and a remainder of 239.
Use 8 as the next digit of our solution. 
Result so far: 306448.0
Subtract 2128 from 2367 to get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Going ahead to step 9:
The number 266 fits into 2390 8 times, leaving a remainder of 262.
Put 8 as the next digit of the answer. 
Result so far: 306448.8
The remainder is 262 after subtracting 2128 from 2390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Going ahead to step 10:
When dividing 2620 by 266, we get 9 with a remainder of 226.
Put 9 as the next digit of the answer. 
Result so far: 306448.89
Deduct 2394 from 2620 and we're left with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

On to step 11:
When dividing 2260 by 266, we get 8 with a remainder of 132.
Record the quotient 8 as the next digit in the result. 
Result so far: 306448.898
The remainder is 132 after subtracting 2128 from 2260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Moving on to step 12:
If we divide 1320 by 266, we get 4 and a remainder of 256.
The next digit of our result is 4. 
Result so far: 306448.8984
Deduct 1064 from 1320 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

On to step 13:
2560 divided by 266 is 9 with a remainder of 166.
Write down 9 as next digit of the result. 
Result so far: 306448.89849
Subtract 2394 from 2560 to get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Going ahead to step 14:
266 can be fit into 1660 6 times, resulting in a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 306448.898496
Subtract 1596 from 1660 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 15:
When dividing 640 by 266, we get 2 with a remainder of 108.
The number 2 becomes the next digit in our result. 
Result so far: 306448.8984962
If we subtract 532 from 640, we get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Moving on to step 16:
When dividing 1080 by 266, we get 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 306448.89849624
Subtract 1064 from 1080 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

In conclusion, the division gives 306448.89849624 with a balance of 1.6e-08.