We divide 3581 by 84
The aim is to understand the frequency of 84 in 3581.

Moving on to step 1:
When dividing 3 by 84, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 84

Advancing to step 2:
The number 84 fits into 35 0 times, leaving a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Include the next digit (8) from the dividend after 35, then repeat: 358 / 84

Step 3:
84 goes into 358 4 times with a remainder of 22.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 336 away from 358, we end up with 22.
Include the next digit (1) from the dividend after 22, then repeat: 221 / 84

Advancing to step 4:
The number 84 fits into 221 2 times, leaving a remainder of 53.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
Deduct 168 from 221 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Advancing to step 5:
84 can be fit into 530 6 times, resulting in a remainder of 26.
The number 6 becomes the next digit in our result. 
Result so far: 42.6
If we subtract 504 from 530, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 6:
84 can be fit into 260 3 times, resulting in a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 42.63
The remainder is 8 after subtracting 252 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
84 can be fit into 80 0 times, resulting in a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 42.63
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 8:
If we divide 800 by 84, we get 9 and a remainder of 44.
Write down 9 as next digit of the result. 
Result so far: 42.6309
If we take 756 away from 800, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 9:
The number 84 fits into 440 5 times, leaving a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 42.63095
If we take 420 away from 440, we end up with 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 10:
When dividing 200 by 84, we get 2 with a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 42.630952
If we take 168 away from 200, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 11:
The number 84 fits into 320 3 times, leaving a remainder of 68.
The number 3 becomes the next digit in our result. 
Result so far: 42.6309523
Subtracting 252 from 320 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 12:
If we divide 680 by 84, we get 8 and a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 42.63095238
If we take 672 away from 680, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 42.63095238 and a remainder of 8e-09.