161821 ÷ 25 
Our goal is to divide 161821 by 25.

Let's proceed to step 1:
25 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 25

Step 2:
25 goes into 16 0 times with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 25

Going ahead to step 3:
161 divided by 25 is 6 with a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 11 after subtracting 150 from 161.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 25

Moving on to step 4:
When dividing 118 by 25, we get 4 with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 64.0
Subtracting 100 from 118 leaves us with 18.
Fetch the next digit (2) from the dividend, attach it to 18 and continue: 182 / 25

Advancing to step 5:
25 can be fit into 182 7 times, resulting in a remainder of 7.
The next digit of our result is 7. 
Result so far: 647.0
Subtract 175 from 182 to get 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 25

Moving on to step 6:
25 can be fit into 71 2 times, resulting in a remainder of 21.
Record the quotient 2 as the next digit in the result. 
Result so far: 6472.0
The remainder is 21 after subtracting 50 from 71.
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 7:
When dividing 210 by 25, we get 8 with a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 6472.8
If we subtract 200 from 210, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
If we divide 100 by 25, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 6472.84
If we subtract 100 from 100, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6472.84
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
0 divided by 25 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 6472.84
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 6472.84 with a remaining 0.0.