We divide 523515 by 81
The aim is to understand the frequency of 81 in 523515.

Let's proceed to step 1:
If we divide 5 by 81, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 81

Moving on to step 2:
The number 81 fits into 52 0 times, leaving a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 52, we end up with 52.
Grab the next digit (3) from the dividend, add it to 52, then carry on: 523 / 81

Step 3:
81 goes into 523 6 times with a remainder of 37.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 486 from 523, we get 37.
Bring next digit (5) of the dividend behind the 37 and repeat the process: 375 / 81

Step 4:
When dividing 375 by 81, we get 4 with a remainder of 51.
Write down 4 as next digit of the result. 
Result so far: 64.0
If we take 324 away from 375, we end up with 51.
Fetch the next digit (1) from the dividend, attach it to 51 and continue: 511 / 81

Let's proceed to step 5:
When dividing 511 by 81, we get 6 with a remainder of 25.
The next digit of our result is 6. 
Result so far: 646.0
Subtract 486 from 511 to get 25.
Take the next digit (5) from the dividend and append it to 25, then repeat: 255 / 81

On to step 6:
If we divide 255 by 81, we get 3 and a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 6463.0
Deduct 243 from 255 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
81 can be fit into 120 1 times, resulting in a remainder of 39.
The next digit of our result is 1. 
Result so far: 6463.1
The remainder is 39 after subtracting 81 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 8:
When dividing 390 by 81, we get 4 with a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 6463.14
If we subtract 324 from 390, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 9:
When dividing 660 by 81, we get 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 6463.148
Subtracting 648 from 660 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 10:
If we divide 120 by 81, we get 1 and a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 6463.1481
The remainder is 39 after subtracting 81 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 11:
When dividing 390 by 81, we get 4 with a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 6463.14814
Subtract 324 from 390 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 12:
660 divided by 81 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 6463.148148
Deduct 648 from 660 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
120 divided by 81 is 1 with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 6463.1481481
If we take 81 away from 120, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 14:
The number 81 fits into 390 4 times, leaving a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 6463.14814814
The remainder is 66 after subtracting 324 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The quotient of the division is 6463.14814814, and the remainder is 6.6e-08.