21710381 ÷ 266 
We're looking to find how many times 266 goes into 21710381.

Let's proceed to step 1:
266 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 266

Let's proceed to step 2:
266 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (7) from the dividend and append it to 21, then repeat: 217 / 266

Advancing to step 3:
When dividing 217 by 266, we get 0 with a remainder of 217.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 217 to get 217.
Take the next digit (1) from the dividend and append it to 217, then repeat: 2171 / 266

Going ahead to step 4:
266 goes into 2171 8 times with a remainder of 43.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 2128 from 2171 to get 43.
Take the next digit (0) from the dividend and append it to 43, then repeat: 430 / 266

Going ahead to step 5:
266 can be fit into 430 1 times, resulting in a remainder of 164.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
Deduct 266 from 430 and we're left with 164.
Fetch the next digit (3) from the dividend, attach it to 164 and continue: 1643 / 266

Let's proceed to step 6:
The number 266 fits into 1643 6 times, leaving a remainder of 47.
The next digit of our result is 6. 
Result so far: 816.0
The remainder is 47 after subtracting 1596 from 1643.
Fetch the next digit (8) from the dividend, attach it to 47 and continue: 478 / 266

Let's proceed to step 7:
478 divided by 266 is 1 with a remainder of 212.
Write down 1 as next digit of the result. 
Result so far: 8161.0
If we take 266 away from 478, we end up with 212.
Include the next digit (1) from the dividend after 212, then repeat: 2121 / 266

Let's proceed to step 8:
When dividing 2121 by 266, we get 7 with a remainder of 259.
Put 7 as the next digit of the answer. 
Result so far: 81617.0
If we take 1862 away from 2121, we end up with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Step 9:
The number 266 fits into 2590 9 times, leaving a remainder of 196.
The number 9 becomes the next digit in our result. 
Result so far: 81617.9
The remainder is 196 after subtracting 2394 from 2590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Step 10:
266 goes into 1960 7 times with a remainder of 98.
The next digit of our result is 7. 
Result so far: 81617.97
If we take 1862 away from 1960, we end up with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 11:
980 divided by 266 is 3 with a remainder of 182.
Write down 3 as next digit of the result. 
Result so far: 81617.973
The remainder is 182 after subtracting 798 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

On to step 12:
266 can be fit into 1820 6 times, resulting in a remainder of 224.
The next digit of our result is 6. 
Result so far: 81617.9736
Deduct 1596 from 1820 and we're left with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 13:
2240 divided by 266 is 8 with a remainder of 112.
Put 8 as the next digit of the answer. 
Result so far: 81617.97368
If we take 2128 away from 2240, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 14:
266 goes into 1120 4 times with a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 81617.973684
Subtract 1064 from 1120 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 15:
The number 266 fits into 560 2 times, leaving a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 81617.9736842
If we subtract 532 from 560, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 16:
280 divided by 266 is 1 with a remainder of 14.
The next digit of our result is 1. 
Result so far: 81617.97368421
Subtracting 266 from 280 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 81617.97368421, with a leftover of 1.4e-08.