99870341 divided by 523 
The aim is to understand the frequency of 523 in 99870341.

Advancing to step 1:
When dividing 9 by 523, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 523

Moving on to step 2:
The number 523 fits into 99 0 times, leaving a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Append the next digit (8) from the dividend to 99 and continue with: 998 / 523

Moving on to step 3:
The number 523 fits into 998 1 times, leaving a remainder of 475.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 475 after subtracting 523 from 998.
Fetch the next digit (7) from the dividend, attach it to 475 and continue: 4757 / 523

Going ahead to step 4:
4757 divided by 523 is 9 with a remainder of 50.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we take 4707 away from 4757, we end up with 50.
Fetch the next digit (0) from the dividend, attach it to 50 and continue: 500 / 523

Let's proceed to step 5:
523 can be fit into 500 0 times, resulting in a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 190.0
If we subtract 0 from 500, we get 500.
Bring next digit (3) of the dividend behind the 500 and repeat the process: 5003 / 523

Let's proceed to step 6:
523 can be fit into 5003 9 times, resulting in a remainder of 296.
Put 9 as the next digit of the answer. 
Result so far: 1909.0
If we subtract 4707 from 5003, we get 296.
Grab the next digit (4) from the dividend, add it to 296, then carry on: 2964 / 523

On to step 7:
2964 divided by 523 is 5 with a remainder of 349.
Write down 5 as next digit of the result. 
Result so far: 19095.0
If we subtract 2615 from 2964, we get 349.
Grab the next digit (1) from the dividend, add it to 349, then carry on: 3491 / 523

Moving on to step 8:
3491 divided by 523 is 6 with a remainder of 353.
Put 6 as the next digit of the answer. 
Result so far: 190956.0
The remainder is 353 after subtracting 3138 from 3491.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

On to step 9:
523 goes into 3530 6 times with a remainder of 392.
The next digit of our result is 6. 
Result so far: 190956.6
Subtracting 3138 from 3530 leaves us with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

On to step 10:
When dividing 3920 by 523, we get 7 with a remainder of 259.
Record the quotient 7 as the next digit in the result. 
Result so far: 190956.67
If we take 3661 away from 3920, we end up with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Let's proceed to step 11:
If we divide 2590 by 523, we get 4 and a remainder of 498.
The next digit of our result is 4. 
Result so far: 190956.674
Subtracting 2092 from 2590 leaves us with 498.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4980, and continue the process.

Step 12:
523 goes into 4980 9 times with a remainder of 273.
Put 9 as the next digit of the answer. 
Result so far: 190956.6749
Subtracting 4707 from 4980 leaves us with 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

On to step 13:
If we divide 2730 by 523, we get 5 and a remainder of 115.
Record the quotient 5 as the next digit in the result. 
Result so far: 190956.67495
The remainder is 115 after subtracting 2615 from 2730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Advancing to step 14:
The number 523 fits into 1150 2 times, leaving a remainder of 104.
Use 2 as the next digit of our solution. 
Result so far: 190956.674952
Subtract 1046 from 1150 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 15:
The number 523 fits into 1040 1 times, leaving a remainder of 517.
The next digit of our result is 1. 
Result so far: 190956.6749521
If we take 523 away from 1040, we end up with 517.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5170, and continue the process.

Advancing to step 16:
If we divide 5170 by 523, we get 9 and a remainder of 463.
Write down 9 as next digit of the result. 
Result so far: 190956.67495219
Subtracting 4707 from 5170 leaves us with 463.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4630, and continue the process.

The quotient of the division is 190956.67495219, and the remainder is 4.63e-07.