We look at the division of 66403521 by 758 
Let's see how many times 758 fits into 66403521.

Going ahead to step 1:
If we divide 6 by 758, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 758

Moving on to step 2:
758 can be fit into 66 0 times, resulting in 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 (4) from the dividend to 66 and continue with: 664 / 758

Advancing to step 3:
758 can be fit into 664 0 times, resulting in a remainder of 664.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 664 leaves us with 664.
Include the next digit (0) from the dividend after 664, then repeat: 6640 / 758

Moving on to step 4:
If we divide 6640 by 758, we get 8 and a remainder of 576.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 576 after subtracting 6064 from 6640.
Fetch the next digit (3) from the dividend, attach it to 576 and continue: 5763 / 758

Let's proceed to step 5:
If we divide 5763 by 758, we get 7 and a remainder of 457.
The next digit of our result is 7. 
Result so far: 87.0
Deduct 5306 from 5763 and we're left with 457.
Take the next digit (5) from the dividend and append it to 457, then repeat: 4575 / 758

Going ahead to step 6:
758 goes into 4575 6 times with a remainder of 27.
Use 6 as the next digit of our solution. 
Result so far: 876.0
Subtracting 4548 from 4575 leaves us with 27.
Take the next digit (2) from the dividend and append it to 27, then repeat: 272 / 758

Step 7:
272 divided by 758 is 0 with a remainder of 272.
The next digit of our result is 0. 
Result so far: 8760.0
The remainder is 272 after subtracting 0 from 272.
Fetch the next digit (1) from the dividend, attach it to 272 and continue: 2721 / 758

On to step 8:
If we divide 2721 by 758, we get 3 and a remainder of 447.
Record the quotient 3 as the next digit in the result. 
Result so far: 87603.0
Subtract 2274 from 2721 to get 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Moving on to step 9:
When dividing 4470 by 758, we get 5 with a remainder of 680.
Record the quotient 5 as the next digit in the result. 
Result so far: 87603.5
Deduct 3790 from 4470 and we're left with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Moving on to step 10:
6800 divided by 758 is 8 with a remainder of 736.
Write down 8 as next digit of the result. 
Result so far: 87603.58
The remainder is 736 after subtracting 6064 from 6800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

Step 11:
When dividing 7360 by 758, we get 9 with a remainder of 538.
Write down 9 as next digit of the result. 
Result so far: 87603.589
Subtracting 6822 from 7360 leaves us with 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Let's proceed to step 12:
758 can be fit into 5380 7 times, resulting in a remainder of 74.
Put 7 as the next digit of the answer. 
Result so far: 87603.5897
Deduct 5306 from 5380 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 13:
If we divide 740 by 758, we get 0 and a remainder of 740.
Write down 0 as next digit of the result. 
Result so far: 87603.5897
If we subtract 0 from 740, we get 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

Step 14:
When dividing 7400 by 758, we get 9 with a remainder of 578.
The next digit of our result is 9. 
Result so far: 87603.589709
Subtract 6822 from 7400 to get 578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5780, and continue the process.

Moving on to step 15:
758 goes into 5780 7 times with a remainder of 474.
The next digit of our result is 7. 
Result so far: 87603.5897097
Deduct 5306 from 5780 and we're left with 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Step 16:
If we divide 4740 by 758, we get 6 and a remainder of 192.
The next digit of our result is 6. 
Result so far: 87603.58970976
The remainder is 192 after subtracting 4548 from 4740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

In conclusion, the division gives 87603.58970976 with a balance of 1.92e-07.