Let's divide 87538015 by 668
The aim is to understand the frequency of 668 in 87538015.

Going ahead to step 1:
668 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 668

Let's proceed to step 2:
668 can be fit into 87 0 times, resulting in a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 87 to get 87.
Bring next digit (5) of the dividend behind the 87 and repeat the process: 875 / 668

Going ahead to step 3:
875 divided by 668 is 1 with a remainder of 207.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 668 from 875 to get 207.
Bring next digit (3) of the dividend behind the 207 and repeat the process: 2073 / 668

On to step 4:
668 goes into 2073 3 times with a remainder of 69.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtracting 2004 from 2073 leaves us with 69.
Fetch the next digit (8) from the dividend, attach it to 69 and continue: 698 / 668

Let's proceed to step 5:
The number 668 fits into 698 1 times, leaving a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 131.0
Deduct 668 from 698 and we're left with 30.
Grab the next digit (0) from the dividend, add it to 30, then carry on: 300 / 668

Advancing to step 6:
The number 668 fits into 300 0 times, leaving a remainder of 300.
Put 0 as the next digit of the answer. 
Result so far: 1310.0
If we subtract 0 from 300, we get 300.
Take the next digit (1) from the dividend and append it to 300, then repeat: 3001 / 668

On to step 7:
The number 668 fits into 3001 4 times, leaving a remainder of 329.
The next digit of our result is 4. 
Result so far: 13104.0
Subtracting 2672 from 3001 leaves us with 329.
Bring next digit (5) of the dividend behind the 329 and repeat the process: 3295 / 668

Going ahead to step 8:
668 can be fit into 3295 4 times, resulting in a remainder of 623.
Record the quotient 4 as the next digit in the result. 
Result so far: 131044.0
Subtracting 2672 from 3295 leaves us with 623.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

Let's proceed to step 9:
If we divide 6230 by 668, we get 9 and a remainder of 218.
The next digit of our result is 9. 
Result so far: 131044.9
If we take 6012 away from 6230, we end up with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Moving on to step 10:
668 goes into 2180 3 times with a remainder of 176.
Put 3 as the next digit of the answer. 
Result so far: 131044.93
Subtracting 2004 from 2180 leaves us with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Going ahead to step 11:
668 can be fit into 1760 2 times, resulting in a remainder of 424.
The number 2 becomes the next digit in our result. 
Result so far: 131044.932
If we subtract 1336 from 1760, we get 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Let's proceed to step 12:
4240 divided by 668 is 6 with a remainder of 232.
Put 6 as the next digit of the answer. 
Result so far: 131044.9326
If we take 4008 away from 4240, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Going ahead to step 13:
668 can be fit into 2320 3 times, resulting in a remainder of 316.
The next digit of our result is 3. 
Result so far: 131044.93263
Subtract 2004 from 2320 to get 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Advancing to step 14:
If we divide 3160 by 668, we get 4 and a remainder of 488.
Write down 4 as next digit of the result. 
Result so far: 131044.932634
If we subtract 2672 from 3160, we get 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Moving on to step 15:
668 goes into 4880 7 times with a remainder of 204.
Put 7 as the next digit of the answer. 
Result so far: 131044.9326347
Subtract 4676 from 4880 to get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Moving on to step 16:
The number 668 fits into 2040 3 times, leaving a remainder of 36.
Put 3 as the next digit of the answer. 
Result so far: 131044.93263473
Subtract 2004 from 2040 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The quotient of the division is 131044.93263473, and the remainder is 3.6e-08.