81721235 divided by 608 
We want to figure out the number of times 81721235 can be divided by 608.

Step 1:
608 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 608

Going ahead to step 2:
When dividing 81 by 608, we get 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Bring next digit (7) of the dividend behind the 81 and repeat the process: 817 / 608

Advancing to step 3:
817 divided by 608 is 1 with a remainder of 209.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 608 from 817 and we're left with 209.
Bring next digit (2) of the dividend behind the 209 and repeat the process: 2092 / 608

Let's proceed to step 4:
2092 divided by 608 is 3 with a remainder of 268.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Deduct 1824 from 2092 and we're left with 268.
Fetch the next digit (1) from the dividend, attach it to 268 and continue: 2681 / 608

On to step 5:
608 can be fit into 2681 4 times, resulting in a remainder of 249.
Write down 4 as next digit of the result. 
Result so far: 134.0
Subtract 2432 from 2681 to get 249.
Bring next digit (2) of the dividend behind the 249 and repeat the process: 2492 / 608

Advancing to step 6:
2492 divided by 608 is 4 with a remainder of 60.
Record the quotient 4 as the next digit in the result. 
Result so far: 1344.0
Subtract 2432 from 2492 to get 60.
Take the next digit (3) from the dividend and append it to 60, then repeat: 603 / 608

Going ahead to step 7:
When dividing 603 by 608, we get 0 with a remainder of 603.
The next digit of our result is 0. 
Result so far: 13440.0
The remainder is 603 after subtracting 0 from 603.
Bring next digit (5) of the dividend behind the 603 and repeat the process: 6035 / 608

Going ahead to step 8:
The number 608 fits into 6035 9 times, leaving a remainder of 563.
The number 9 becomes the next digit in our result. 
Result so far: 134409.0
If we subtract 5472 from 6035, we get 563.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5630, and continue the process.

Let's proceed to step 9:
The number 608 fits into 5630 9 times, leaving a remainder of 158.
Put 9 as the next digit of the answer. 
Result so far: 134409.9
If we take 5472 away from 5630, we end up with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Advancing to step 10:
When dividing 1580 by 608, we get 2 with a remainder of 364.
Write down 2 as next digit of the result. 
Result so far: 134409.92
The remainder is 364 after subtracting 1216 from 1580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

On to step 11:
The number 608 fits into 3640 5 times, leaving a remainder of 600.
The number 5 becomes the next digit in our result. 
Result so far: 134409.925
If we take 3040 away from 3640, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Let's proceed to step 12:
The number 608 fits into 6000 9 times, leaving a remainder of 528.
Use 9 as the next digit of our solution. 
Result so far: 134409.9259
Subtract 5472 from 6000 to get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Let's proceed to step 13:
608 can be fit into 5280 8 times, resulting in a remainder of 416.
The next digit of our result is 8. 
Result so far: 134409.92598
If we subtract 4864 from 5280, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

On to step 14:
The number 608 fits into 4160 6 times, leaving a remainder of 512.
Put 6 as the next digit of the answer. 
Result so far: 134409.925986
Subtracting 3648 from 4160 leaves us with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

On to step 15:
If we divide 5120 by 608, we get 8 and a remainder of 256.
The next digit of our result is 8. 
Result so far: 134409.9259868
If we subtract 4864 from 5120, we get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 16:
608 goes into 2560 4 times with a remainder of 128.
The next digit of our result is 4. 
Result so far: 134409.92598684
Subtracting 2432 from 2560 leaves us with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The final result is 134409.92598684 with a remainder of 1.28e-07.