658405 divided by 66 
We're looking to find how many times 66 goes into 658405.

Step 1:
The number 66 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 66

On to step 2:
66 goes into 65 0 times with a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 65, we get 65.
Bring next digit (8) of the dividend behind the 65 and repeat the process: 658 / 66

Step 3:
66 can be fit into 658 9 times, resulting in a remainder of 64.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 594 from 658, we get 64.
Take the next digit (4) from the dividend and append it to 64, then repeat: 644 / 66

Step 4:
644 divided by 66 is 9 with a remainder of 50.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
If we take 594 away from 644, we end up with 50.
Grab the next digit (0) from the dividend, add it to 50, then carry on: 500 / 66

Moving on to step 5:
When dividing 500 by 66, we get 7 with a remainder of 38.
The next digit of our result is 7. 
Result so far: 997.0
Subtract 462 from 500 to get 38.
Append the next digit (5) from the dividend to 38 and continue with: 385 / 66

On to step 6:
66 can be fit into 385 5 times, resulting in a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 9975.0
Deduct 330 from 385 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 7:
When dividing 550 by 66, we get 8 with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 9975.8
If we take 528 away from 550, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 8:
If we divide 220 by 66, we get 3 and a remainder of 22.
The number 3 becomes the next digit in our result. 
Result so far: 9975.83
If we subtract 198 from 220, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 9:
66 can be fit into 220 3 times, resulting in a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 9975.833
The remainder is 22 after subtracting 198 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final outcome is 9975.833, with a leftover of 0.0022.