We divide 260290 by 66
We want to figure out the number of times 260290 can be divided by 66.

Advancing to step 1:
66 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.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 66

Advancing to step 2:
26 divided by 66 is 0 with a remainder of 26.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 26 to get 26.
Include the next digit (0) from the dividend after 26, then repeat: 260 / 66

Step 3:
If we divide 260 by 66, we get 3 and a remainder of 62.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 198 from 260 to get 62.
Grab the next digit (2) from the dividend, add it to 62, then carry on: 622 / 66

Moving on to step 4:
622 divided by 66 is 9 with a remainder of 28.
Write down 9 as next digit of the result. 
Result so far: 39.0
If we subtract 594 from 622, we get 28.
Grab the next digit (9) from the dividend, add it to 28, then carry on: 289 / 66

Going ahead to step 5:
289 divided by 66 is 4 with a remainder of 25.
Record the quotient 4 as the next digit in the result. 
Result so far: 394.0
Subtract 264 from 289 to get 25.
Append the next digit (0) from the dividend to 25 and continue with: 250 / 66

Step 6:
If we divide 250 by 66, we get 3 and a remainder of 52.
Write down 3 as next digit of the result. 
Result so far: 3943.0
If we subtract 198 from 250, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 7:
66 goes into 520 7 times with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 3943.7
Subtract 462 from 520 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 8:
If we divide 580 by 66, we get 8 and a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 3943.78
Subtracting 528 from 580 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 9:
If we divide 520 by 66, we get 7 and a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 3943.787
If we subtract 462 from 520, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 10:
66 can be fit into 580 8 times, resulting in a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 3943.7878
Subtract 528 from 580 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 11:
The number 66 fits into 520 7 times, leaving a remainder of 58.
The next digit of our result is 7. 
Result so far: 3943.78787
If we subtract 462 from 520, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 12:
66 goes into 580 8 times with a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 3943.787878
If we subtract 528 from 580, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 13:
The number 66 fits into 520 7 times, leaving a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 3943.7878787
Deduct 462 from 520 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 14:
The number 66 fits into 580 8 times, leaving a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 3943.78787878
Deduct 528 from 580 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final result is 3943.78787878 with a remainder of 5.2e-08.