8582570 divided by 161 
The aim is to understand the frequency of 161 in 8582570.

Step 1:
8 divided by 161 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 161

Advancing to step 2:
161 can be fit into 85 0 times, resulting in a remainder of 85.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 85 after subtracting 0 from 85.
Include the next digit (8) from the dividend after 85, then repeat: 858 / 161

On to step 3:
858 divided by 161 is 5 with a remainder of 53.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 805 from 858 to get 53.
Append the next digit (2) from the dividend to 53 and continue with: 532 / 161

Let's proceed to step 4:
161 can be fit into 532 3 times, resulting in a remainder of 49.
Write down 3 as next digit of the result. 
Result so far: 53.0
The remainder is 49 after subtracting 483 from 532.
Take the next digit (5) from the dividend and append it to 49, then repeat: 495 / 161

Advancing to step 5:
If we divide 495 by 161, we get 3 and a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 533.0
Deduct 483 from 495 and we're left with 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 161

Step 6:
161 goes into 127 0 times with a remainder of 127.
Write down 0 as next digit of the result. 
Result so far: 5330.0
The remainder is 127 after subtracting 0 from 127.
Include the next digit (0) from the dividend after 127, then repeat: 1270 / 161

Advancing to step 7:
If we divide 1270 by 161, we get 7 and a remainder of 143.
Write down 7 as next digit of the result. 
Result so far: 53307.0
The remainder is 143 after subtracting 1127 from 1270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

On to step 8:
161 goes into 1430 8 times with a remainder of 142.
Record the quotient 8 as the next digit in the result. 
Result so far: 53307.8
If we subtract 1288 from 1430, we get 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Moving on to step 9:
The number 161 fits into 1420 8 times, leaving a remainder of 132.
Record the quotient 8 as the next digit in the result. 
Result so far: 53307.88
Subtract 1288 from 1420 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

In conclusion, the division gives 53307.88 with a balance of 0.132.