42905486 divided by 660 
The aim is to understand the frequency of 660 in 42905486.

Step 1:
660 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 660

On to step 2:
660 can be fit into 42 0 times, resulting in a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Take the next digit (9) from the dividend and append it to 42, then repeat: 429 / 660

Moving on to step 3:
660 can be fit into 429 0 times, resulting in a remainder of 429.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 429 after subtracting 0 from 429.
Grab the next digit (0) from the dividend, add it to 429, then carry on: 4290 / 660

Moving on to step 4:
660 can be fit into 4290 6 times, resulting in a remainder of 330.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Deduct 3960 from 4290 and we're left with 330.
Bring next digit (5) of the dividend behind the 330 and repeat the process: 3305 / 660

Going ahead to step 5:
If we divide 3305 by 660, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 65.0
If we subtract 3300 from 3305, we get 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 660

Step 6:
When dividing 54 by 660, we get 0 with a remainder of 54.
The next digit of our result is 0. 
Result so far: 650.0
Subtracting 0 from 54 leaves us with 54.
Grab the next digit (8) from the dividend, add it to 54, then carry on: 548 / 660

Step 7:
548 divided by 660 is 0 with a remainder of 548.
Use 0 as the next digit of our solution. 
Result so far: 6500.0
If we take 0 away from 548, we end up with 548.
Fetch the next digit (6) from the dividend, attach it to 548 and continue: 5486 / 660

On to step 8:
5486 divided by 660 is 8 with a remainder of 206.
The number 8 becomes the next digit in our result. 
Result so far: 65008.0
Subtracting 5280 from 5486 leaves us with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Let's proceed to step 9:
660 goes into 2060 3 times with a remainder of 80.
Record the quotient 3 as the next digit in the result. 
Result so far: 65008.3
Deduct 1980 from 2060 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 10:
The number 660 fits into 800 1 times, leaving a remainder of 140.
Put 1 as the next digit of the answer. 
Result so far: 65008.31
Subtracting 660 from 800 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 11:
660 can be fit into 1400 2 times, resulting in a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 65008.312
Subtract 1320 from 1400 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 12:
If we divide 800 by 660, we get 1 and a remainder of 140.
Write down 1 as next digit of the result. 
Result so far: 65008.3121
Deduct 660 from 800 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Step 13:
The number 660 fits into 1400 2 times, leaving a remainder of 80.
Use 2 as the next digit of our solution. 
Result so far: 65008.31212
If we take 1320 away from 1400, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 14:
If we divide 800 by 660, we get 1 and a remainder of 140.
The number 1 becomes the next digit in our result. 
Result so far: 65008.312121
The remainder is 140 after subtracting 660 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 15:
1400 divided by 660 is 2 with a remainder of 80.
Record the quotient 2 as the next digit in the result. 
Result so far: 65008.3121212
Deduct 1320 from 1400 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 16:
800 divided by 660 is 1 with a remainder of 140.
Record the quotient 1 as the next digit in the result. 
Result so far: 65008.31212121
If we subtract 660 from 800, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final outcome is 65008.31212121, with a leftover of 1.4e-07.