We're dividing 61597507 by 646 
The aim is to understand the frequency of 646 in 61597507.

Let's proceed to step 1:
If we divide 6 by 646, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 646

Let's proceed to step 2:
The number 646 fits into 61 0 times, leaving a remainder of 61.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 61, we get 61.
Grab the next digit (5) from the dividend, add it to 61, then carry on: 615 / 646

Moving on to step 3:
646 can be fit into 615 0 times, resulting in a remainder of 615.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 615 and we're left with 615.
Take the next digit (9) from the dividend and append it to 615, then repeat: 6159 / 646

Moving on to step 4:
646 goes into 6159 9 times with a remainder of 345.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 5814 from 6159 leaves us with 345.
Include the next digit (7) from the dividend after 345, then repeat: 3457 / 646

Let's proceed to step 5:
The number 646 fits into 3457 5 times, leaving a remainder of 227.
Use 5 as the next digit of our solution. 
Result so far: 95.0
If we take 3230 away from 3457, we end up with 227.
Fetch the next digit (5) from the dividend, attach it to 227 and continue: 2275 / 646

Let's proceed to step 6:
2275 divided by 646 is 3 with a remainder of 337.
Put 3 as the next digit of the answer. 
Result so far: 953.0
If we take 1938 away from 2275, we end up with 337.
Fetch the next digit (0) from the dividend, attach it to 337 and continue: 3370 / 646

Step 7:
646 can be fit into 3370 5 times, resulting in a remainder of 140.
The next digit of our result is 5. 
Result so far: 9535.0
If we subtract 3230 from 3370, we get 140.
Grab the next digit (7) from the dividend, add it to 140, then carry on: 1407 / 646

On to step 8:
If we divide 1407 by 646, we get 2 and a remainder of 115.
Record the quotient 2 as the next digit in the result. 
Result so far: 95352.0
If we take 1292 away from 1407, we end up with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Advancing to step 9:
When dividing 1150 by 646, we get 1 with a remainder of 504.
The next digit of our result is 1. 
Result so far: 95352.1
If we subtract 646 from 1150, we get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

On to step 10:
The number 646 fits into 5040 7 times, leaving a remainder of 518.
The number 7 becomes the next digit in our result. 
Result so far: 95352.17
The remainder is 518 after subtracting 4522 from 5040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Moving on to step 11:
If we divide 5180 by 646, we get 8 and a remainder of 12.
The next digit of our result is 8. 
Result so far: 95352.178
Subtract 5168 from 5180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 12:
646 goes into 120 0 times with a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 95352.178
Subtracting 0 from 120 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 13:
646 can be fit into 1200 1 times, resulting in a remainder of 554.
Use 1 as the next digit of our solution. 
Result so far: 95352.17801
Subtracting 646 from 1200 leaves us with 554.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

Moving on to step 14:
If we divide 5540 by 646, we get 8 and a remainder of 372.
Write down 8 as next digit of the result. 
Result so far: 95352.178018
If we subtract 5168 from 5540, we get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Moving on to step 15:
When dividing 3720 by 646, we get 5 with a remainder of 490.
The number 5 becomes the next digit in our result. 
Result so far: 95352.1780185
If we subtract 3230 from 3720, we get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Let's proceed to step 16:
4900 divided by 646 is 7 with a remainder of 378.
Put 7 as the next digit of the answer. 
Result so far: 95352.17801857
If we take 4522 away from 4900, we end up with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Our division results in 95352.17801857 with a remaining 3.78e-07.