161811 divided by 61 
The aim is to understand the frequency of 61 in 161811.

Going ahead to step 1:
When dividing 1 by 61, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 61

Moving on to step 2:
16 divided by 61 is 0 with a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 16 and we're left with 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 61

Advancing to step 3:
161 divided by 61 is 2 with a remainder of 39.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 122 from 161 to get 39.
Bring next digit (8) of the dividend behind the 39 and repeat the process: 398 / 61

Advancing to step 4:
61 can be fit into 398 6 times, resulting in a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 26.0
If we subtract 366 from 398, we get 32.
Fetch the next digit (1) from the dividend, attach it to 32 and continue: 321 / 61

Advancing to step 5:
321 divided by 61 is 5 with a remainder of 16.
The next digit of our result is 5. 
Result so far: 265.0
Deduct 305 from 321 and we're left with 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 61

On to step 6:
61 can be fit into 161 2 times, resulting in a remainder of 39.
Use 2 as the next digit of our solution. 
Result so far: 2652.0
Subtract 122 from 161 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 7:
If we divide 390 by 61, we get 6 and a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 2652.6
The remainder is 24 after subtracting 366 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 8:
The number 61 fits into 240 3 times, leaving a remainder of 57.
The next digit of our result is 3. 
Result so far: 2652.63
If we take 183 away from 240, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 9:
61 can be fit into 570 9 times, resulting in a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 2652.639
If we take 549 away from 570, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
210 divided by 61 is 3 with a remainder of 27.
Write down 3 as next digit of the result. 
Result so far: 2652.6393
The remainder is 27 after subtracting 183 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 11:
61 goes into 270 4 times with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 2652.63934
Deduct 244 from 270 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 12:
If we divide 260 by 61, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 2652.639344
The remainder is 16 after subtracting 244 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 2652.639344 with a remaining 1.6e-06.