We're dividing 172890 by 61 
Our goal is to divide 172890 by 61.

Step 1:
61 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 61

On to step 2:
61 can be fit into 17 0 times, resulting in a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 17 leaves us with 17.
Bring next digit (2) of the dividend behind the 17 and repeat the process: 172 / 61

On to step 3:
When dividing 172 by 61, we get 2 with a remainder of 50.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 122 from 172 to get 50.
Bring next digit (8) of the dividend behind the 50 and repeat the process: 508 / 61

Let's proceed to step 4:
508 divided by 61 is 8 with a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 28.0
Deduct 488 from 508 and we're left with 20.
Take the next digit (9) from the dividend and append it to 20, then repeat: 209 / 61

Going ahead to step 5:
61 goes into 209 3 times with a remainder of 26.
Write down 3 as next digit of the result. 
Result so far: 283.0
Subtracting 183 from 209 leaves us with 26.
Fetch the next digit (0) from the dividend, attach it to 26 and continue: 260 / 61

Advancing to step 6:
260 divided by 61 is 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 2834.0
Subtracting 244 from 260 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 7:
61 can be fit into 160 2 times, resulting in a remainder of 38.
Write down 2 as next digit of the result. 
Result so far: 2834.2
If we subtract 122 from 160, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
If we divide 380 by 61, we get 6 and a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 2834.26
Deduct 366 from 380 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
140 divided by 61 is 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 2834.262
Subtract 122 from 140 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 10:
180 divided by 61 is 2 with a remainder of 58.
Use 2 as the next digit of our solution. 
Result so far: 2834.2622
Subtract 122 from 180 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

After the division, we end up with 2834.2622 and a remainder of 0.00058.