661510 ÷ 57 
The aim is to understand the frequency of 57 in 661510.

Moving on to step 1:
If we divide 6 by 57, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 57

Advancing to step 2:
57 goes into 66 1 times with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 57 from 66 leaves us with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 57

On to step 3:
57 goes into 91 1 times with a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 57 away from 91, we end up with 34.
Bring next digit (5) of the dividend behind the 34 and repeat the process: 345 / 57

Step 4:
If we divide 345 by 57, we get 6 and a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 116.0
Subtract 342 from 345 to get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 57

Going ahead to step 5:
The number 57 fits into 31 0 times, leaving a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 1160.0
If we take 0 away from 31, we end up with 31.
Grab the next digit (0) from the dividend, add it to 31, then carry on: 310 / 57

Advancing to step 6:
57 can be fit into 310 5 times, resulting in a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 11605.0
Deduct 285 from 310 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 7:
250 divided by 57 is 4 with a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 11605.4
If we subtract 228 from 250, 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.

Going ahead to step 8:
When dividing 220 by 57, we get 3 with a remainder of 49.
Put 3 as the next digit of the answer. 
Result so far: 11605.43
Subtract 171 from 220 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 9:
57 can be fit into 490 8 times, resulting in a remainder of 34.
Use 8 as the next digit of our solution. 
Result so far: 11605.438
Deduct 456 from 490 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
57 can be fit into 340 5 times, resulting in a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 11605.4385
The remainder is 55 after subtracting 285 from 340.
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 11:
57 goes into 550 9 times with a remainder of 37.
Put 9 as the next digit of the answer. 
Result so far: 11605.43859
Subtract 513 from 550 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Advancing to step 12:
370 divided by 57 is 6 with a remainder of 28.
Put 6 as the next digit of the answer. 
Result so far: 11605.438596
If we subtract 342 from 370, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 13:
280 divided by 57 is 4 with a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 11605.4385964
If we take 228 away from 280, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 14:
57 goes into 520 9 times with a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 11605.43859649
If we take 513 away from 520, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final result is 11605.43859649 with a remainder of 7e-09.