990521 divided by 57 
The aim is to understand the frequency of 57 in 990521.

Let's proceed to step 1:
If we divide 9 by 57, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 57

Step 2:
99 divided by 57 is 1 with a remainder of 42.
The next digit of our result is 1. 
Result so far: 1.0
If we take 57 away from 99, we end up with 42.
Grab the next digit (0) from the dividend, add it to 42, then carry on: 420 / 57

Advancing to step 3:
If we divide 420 by 57, we get 7 and a remainder of 21.
The next digit of our result is 7. 
Result so far: 17.0
Subtract 399 from 420 to get 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 57

On to step 4:
If we divide 215 by 57, we get 3 and a remainder of 44.
The next digit of our result is 3. 
Result so far: 173.0
The remainder is 44 after subtracting 171 from 215.
Append the next digit (2) from the dividend to 44 and continue with: 442 / 57

Advancing to step 5:
When dividing 442 by 57, we get 7 with a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 1737.0
If we subtract 399 from 442, we get 43.
Grab the next digit (1) from the dividend, add it to 43, then carry on: 431 / 57

Let's proceed to step 6:
431 divided by 57 is 7 with a remainder of 32.
Use 7 as the next digit of our solution. 
Result so far: 17377.0
Subtract 399 from 431 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 7:
57 can be fit into 320 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 17377.5
If we subtract 285 from 320, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 8:
57 can be fit into 350 6 times, resulting in a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 17377.56
If we subtract 342 from 350, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
57 can be fit into 80 1 times, resulting in a remainder of 23.
Write down 1 as next digit of the result. 
Result so far: 17377.561
If we subtract 57 from 80, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 10:
57 goes into 230 4 times with a remainder of 2.
The next digit of our result is 4. 
Result so far: 17377.5614
If we take 228 away from 230, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
57 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 17377.5614
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
The number 57 fits into 200 3 times, leaving a remainder of 29.
Put 3 as the next digit of the answer. 
Result so far: 17377.561403
Subtracting 171 from 200 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 13:
57 goes into 290 5 times with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 17377.5614035
If we subtract 285 from 290, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 14:
57 can be fit into 50 0 times, resulting in a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 17377.5614035
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 17377.5614035 with a remainder of 5e-08.