Let's divide 81555390 by 365
We want to figure out the number of times 81555390 can be divided by 365.

Step 1:
When dividing 8 by 365, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our 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 / 365

On to step 2:
If we divide 81 by 365, we get 0 and a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Bring next digit (5) of the dividend behind the 81 and repeat the process: 815 / 365

Advancing to step 3:
815 divided by 365 is 2 with a remainder of 85.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 730 from 815 and we're left with 85.
Bring next digit (5) of the dividend behind the 85 and repeat the process: 855 / 365

Advancing to step 4:
The number 365 fits into 855 2 times, leaving a remainder of 125.
Write down 2 as next digit of the result. 
Result so far: 22.0
Subtract 730 from 855 to get 125.
Fetch the next digit (5) from the dividend, attach it to 125 and continue: 1255 / 365

Going ahead to step 5:
365 can be fit into 1255 3 times, resulting in a remainder of 160.
Use 3 as the next digit of our solution. 
Result so far: 223.0
Subtracting 1095 from 1255 leaves us with 160.
Include the next digit (3) from the dividend after 160, then repeat: 1603 / 365

Advancing to step 6:
The number 365 fits into 1603 4 times, leaving a remainder of 143.
The number 4 becomes the next digit in our result. 
Result so far: 2234.0
If we take 1460 away from 1603, we end up with 143.
Include the next digit (9) from the dividend after 143, then repeat: 1439 / 365

Advancing to step 7:
If we divide 1439 by 365, we get 3 and a remainder of 344.
The next digit of our result is 3. 
Result so far: 22343.0
Subtracting 1095 from 1439 leaves us with 344.
Append the next digit (0) from the dividend to 344 and continue with: 3440 / 365

Moving on to step 8:
365 goes into 3440 9 times with a remainder of 155.
Record the quotient 9 as the next digit in the result. 
Result so far: 223439.0
Subtracting 3285 from 3440 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Let's proceed to step 9:
365 can be fit into 1550 4 times, resulting in a remainder of 90.
Write down 4 as next digit of the result. 
Result so far: 223439.4
If we take 1460 away from 1550, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 10:
365 goes into 900 2 times with a remainder of 170.
Record the quotient 2 as the next digit in the result. 
Result so far: 223439.42
If we take 730 away from 900, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Moving on to step 11:
The number 365 fits into 1700 4 times, leaving a remainder of 240.
Use 4 as the next digit of our solution. 
Result so far: 223439.424
Subtract 1460 from 1700 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 12:
If we divide 2400 by 365, we get 6 and a remainder of 210.
The number 6 becomes the next digit in our result. 
Result so far: 223439.4246
If we take 2190 away from 2400, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Moving on to step 13:
2100 divided by 365 is 5 with a remainder of 275.
Put 5 as the next digit of the answer. 
Result so far: 223439.42465
Subtract 1825 from 2100 to get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 14:
365 goes into 2750 7 times with a remainder of 195.
Use 7 as the next digit of our solution. 
Result so far: 223439.424657
Subtracting 2555 from 2750 leaves us with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Step 15:
When dividing 1950 by 365, we get 5 with a remainder of 125.
Record the quotient 5 as the next digit in the result. 
Result so far: 223439.4246575
Deduct 1825 from 1950 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Advancing to step 16:
365 goes into 1250 3 times with a remainder of 155.
Write down 3 as next digit of the result. 
Result so far: 223439.42465753
The remainder is 155 after subtracting 1095 from 1250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

The final result is 223439.42465753 with a remainder of 1.55e-07.