Let's divide 81405910 by 324
We want to divide 81405910 by 324.

On to step 1:
8 divided by 324 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 324

On to step 2:
324 goes into 81 0 times with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Grab the next digit (4) from the dividend, add it to 81, then carry on: 814 / 324

Advancing to step 3:
If we divide 814 by 324, we get 2 and a remainder of 166.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 648 from 814 to get 166.
Fetch the next digit (0) from the dividend, attach it to 166 and continue: 1660 / 324

Going ahead to step 4:
324 can be fit into 1660 5 times, resulting in a remainder of 40.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
If we subtract 1620 from 1660, we get 40.
Grab the next digit (5) from the dividend, add it to 40, then carry on: 405 / 324

Moving on to step 5:
When dividing 405 by 324, we get 1 with a remainder of 81.
Put 1 as the next digit of the answer. 
Result so far: 251.0
Subtract 324 from 405 to get 81.
Grab the next digit (9) from the dividend, add it to 81, then carry on: 819 / 324

Step 6:
The number 324 fits into 819 2 times, leaving a remainder of 171.
Use 2 as the next digit of our solution. 
Result so far: 2512.0
If we subtract 648 from 819, we get 171.
Fetch the next digit (1) from the dividend, attach it to 171 and continue: 1711 / 324

Step 7:
When dividing 1711 by 324, we get 5 with a remainder of 91.
The number 5 becomes the next digit in our result. 
Result so far: 25125.0
Subtracting 1620 from 1711 leaves us with 91.
Include the next digit (0) from the dividend after 91, then repeat: 910 / 324

Going ahead to step 8:
The number 324 fits into 910 2 times, leaving a remainder of 262.
Record the quotient 2 as the next digit in the result. 
Result so far: 251252.0
If we subtract 648 from 910, we get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Let's proceed to step 9:
324 goes into 2620 8 times with a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 251252.8
The remainder is 28 after subtracting 2592 from 2620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 10:
When dividing 280 by 324, we get 0 with a remainder of 280.
The number 0 becomes the next digit in our result. 
Result so far: 251252.8
Subtract 0 from 280 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 11:
If we divide 2800 by 324, we get 8 and a remainder of 208.
Write down 8 as next digit of the result. 
Result so far: 251252.808
If we take 2592 away from 2800, we end up with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 12:
If we divide 2080 by 324, we get 6 and a remainder of 136.
Write down 6 as next digit of the result. 
Result so far: 251252.8086
If we subtract 1944 from 2080, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Advancing to step 13:
When dividing 1360 by 324, we get 4 with a remainder of 64.
Record the quotient 4 as the next digit in the result. 
Result so far: 251252.80864
Subtract 1296 from 1360 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 14:
324 goes into 640 1 times with a remainder of 316.
Use 1 as the next digit of our solution. 
Result so far: 251252.808641
If we subtract 324 from 640, we get 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Step 15:
The number 324 fits into 3160 9 times, leaving a remainder of 244.
The next digit of our result is 9. 
Result so far: 251252.8086419
Subtract 2916 from 3160 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Moving on to step 16:
If we divide 2440 by 324, we get 7 and a remainder of 172.
Record the quotient 7 as the next digit in the result. 
Result so far: 251252.80864197
The remainder is 172 after subtracting 2268 from 2440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

After the division, we end up with 251252.80864197 and a remainder of 1.72e-07.