We divide 87645809 by 81
Let's see how many times 81 fits into 87645809.

Step 1:
81 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 81

Let's proceed to step 2:
87 divided by 81 is 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 81 away from 87, we end up with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 81

Moving on to step 3:
The number 81 fits into 66 0 times, leaving a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Deduct 0 from 66 and we're left with 66.
Grab the next digit (4) from the dividend, add it to 66, then carry on: 664 / 81

On to step 4:
81 can be fit into 664 8 times, resulting in a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 108.0
Subtract 648 from 664 to get 16.
Include the next digit (5) from the dividend after 16, then repeat: 165 / 81

Step 5:
81 goes into 165 2 times with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 1082.0
If we subtract 162 from 165, we get 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 81

On to step 6:
81 can be fit into 38 0 times, resulting in a remainder of 38.
Use 0 as the next digit of our solution. 
Result so far: 10820.0
If we subtract 0 from 38, we get 38.
Grab the next digit (0) from the dividend, add it to 38, then carry on: 380 / 81

Advancing to step 7:
If we divide 380 by 81, we get 4 and a remainder of 56.
The next digit of our result is 4. 
Result so far: 108204.0
Deduct 324 from 380 and we're left with 56.
Fetch the next digit (9) from the dividend, attach it to 56 and continue: 569 / 81

Moving on to step 8:
569 divided by 81 is 7 with a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 1082047.0
If we subtract 567 from 569, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
81 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 1082047.0
Deduct 0 from 20 and we're left 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.

Moving on to step 10:
81 goes into 200 2 times with a remainder of 38.
The next digit of our result is 2. 
Result so far: 1082047.02
Subtract 162 from 200 to 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 11:
380 divided by 81 is 4 with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 1082047.024
If we take 324 away from 380, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 12:
81 can be fit into 560 6 times, resulting in a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 1082047.0246
Subtract 486 from 560 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 13:
81 goes into 740 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 1082047.02469
Deduct 729 from 740 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 14:
If we divide 110 by 81, we get 1 and a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 1082047.024691
If we subtract 81 from 110, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 15:
The number 81 fits into 290 3 times, leaving a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 1082047.0246913
Subtracting 243 from 290 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 16:
470 divided by 81 is 5 with a remainder of 65.
The next digit of our result is 5. 
Result so far: 1082047.02469135
If we subtract 405 from 470, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

After the division, we end up with 1082047.02469135 and a remainder of 6.5e-08.