We look at the division of 64639866 by 897 
The aim is to understand the frequency of 897 in 64639866.

Advancing to step 1:
If we divide 6 by 897, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 897

Let's proceed to step 2:
64 divided by 897 is 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Fetch the next digit (6) from the dividend, attach it to 64 and continue: 646 / 897

Step 3:
When dividing 646 by 897, we get 0 with a remainder of 646.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 646, we get 646.
Bring next digit (3) of the dividend behind the 646 and repeat the process: 6463 / 897

Advancing to step 4:
If we divide 6463 by 897, we get 7 and a remainder of 184.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 6279 from 6463 leaves us with 184.
Fetch the next digit (9) from the dividend, attach it to 184 and continue: 1849 / 897

Moving on to step 5:
The number 897 fits into 1849 2 times, leaving a remainder of 55.
Put 2 as the next digit of the answer. 
Result so far: 72.0
Deduct 1794 from 1849 and we're left with 55.
Grab the next digit (8) from the dividend, add it to 55, then carry on: 558 / 897

Moving on to step 6:
When dividing 558 by 897, we get 0 with a remainder of 558.
Use 0 as the next digit of our solution. 
Result so far: 720.0
Subtracting 0 from 558 leaves us with 558.
Bring next digit (6) of the dividend behind the 558 and repeat the process: 5586 / 897

Advancing to step 7:
If we divide 5586 by 897, we get 6 and a remainder of 204.
Use 6 as the next digit of our solution. 
Result so far: 7206.0
The remainder is 204 after subtracting 5382 from 5586.
Grab the next digit (6) from the dividend, add it to 204, then carry on: 2046 / 897

Advancing to step 8:
When dividing 2046 by 897, we get 2 with a remainder of 252.
Put 2 as the next digit of the answer. 
Result so far: 72062.0
Deduct 1794 from 2046 and we're left with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Moving on to step 9:
The number 897 fits into 2520 2 times, leaving a remainder of 726.
Record the quotient 2 as the next digit in the result. 
Result so far: 72062.2
Subtracting 1794 from 2520 leaves us with 726.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7260, and continue the process.

On to step 10:
897 goes into 7260 8 times with a remainder of 84.
The next digit of our result is 8. 
Result so far: 72062.28
If we subtract 7176 from 7260, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 11:
840 divided by 897 is 0 with a remainder of 840.
Write down 0 as next digit of the result. 
Result so far: 72062.28
If we subtract 0 from 840, we get 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Let's proceed to step 12:
8400 divided by 897 is 9 with a remainder of 327.
Write down 9 as next digit of the result. 
Result so far: 72062.2809
If we take 8073 away from 8400, we end up with 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Advancing to step 13:
897 can be fit into 3270 3 times, resulting in a remainder of 579.
Put 3 as the next digit of the answer. 
Result so far: 72062.28093
Subtract 2691 from 3270 to get 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

Advancing to step 14:
When dividing 5790 by 897, we get 6 with a remainder of 408.
Put 6 as the next digit of the answer. 
Result so far: 72062.280936
If we take 5382 away from 5790, we end up with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Advancing to step 15:
The number 897 fits into 4080 4 times, leaving a remainder of 492.
The next digit of our result is 4. 
Result so far: 72062.2809364
If we subtract 3588 from 4080, we get 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Advancing to step 16:
897 can be fit into 4920 5 times, resulting in a remainder of 435.
Write down 5 as next digit of the result. 
Result so far: 72062.28093645
The remainder is 435 after subtracting 4485 from 4920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

The quotient of the division is 72062.28093645, and the remainder is 4.35e-07.