Let's divide 99693886 by 643
The aim is to understand the frequency of 643 in 99693886.

Advancing to step 1:
The number 643 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 643

Advancing to step 2:
643 goes into 99 0 times with 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.
Fetch the next digit (6) from the dividend, attach it to 99 and continue: 996 / 643

Let's proceed to step 3:
643 goes into 996 1 times with a remainder of 353.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 643 from 996, we get 353.
Bring next digit (9) of the dividend behind the 353 and repeat the process: 3539 / 643

Let's proceed to step 4:
643 can be fit into 3539 5 times, resulting in a remainder of 324.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we take 3215 away from 3539, we end up with 324.
Grab the next digit (3) from the dividend, add it to 324, then carry on: 3243 / 643

Going ahead to step 5:
If we divide 3243 by 643, we get 5 and a remainder of 28.
Put 5 as the next digit of the answer. 
Result so far: 155.0
If we subtract 3215 from 3243, we get 28.
Take the next digit (8) from the dividend and append it to 28, then repeat: 288 / 643

Going ahead to step 6:
643 can be fit into 288 0 times, resulting in a remainder of 288.
Use 0 as the next digit of our solution. 
Result so far: 1550.0
If we subtract 0 from 288, we get 288.
Fetch the next digit (8) from the dividend, attach it to 288 and continue: 2888 / 643

Advancing to step 7:
The number 643 fits into 2888 4 times, leaving a remainder of 316.
Put 4 as the next digit of the answer. 
Result so far: 15504.0
If we subtract 2572 from 2888, we get 316.
Grab the next digit (6) from the dividend, add it to 316, then carry on: 3166 / 643

Moving on to step 8:
643 can be fit into 3166 4 times, resulting in a remainder of 594.
Record the quotient 4 as the next digit in the result. 
Result so far: 155044.0
Subtracting 2572 from 3166 leaves us with 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Advancing to step 9:
When dividing 5940 by 643, we get 9 with a remainder of 153.
Use 9 as the next digit of our solution. 
Result so far: 155044.9
Subtract 5787 from 5940 to get 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Advancing to step 10:
643 can be fit into 1530 2 times, resulting in a remainder of 244.
The next digit of our result is 2. 
Result so far: 155044.92
If we take 1286 away from 1530, we end up with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Step 11:
643 goes into 2440 3 times with a remainder of 511.
Put 3 as the next digit of the answer. 
Result so far: 155044.923
Deduct 1929 from 2440 and we're left with 511.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5110, and continue the process.

Let's proceed to step 12:
5110 divided by 643 is 7 with a remainder of 609.
The next digit of our result is 7. 
Result so far: 155044.9237
Deduct 4501 from 5110 and we're left with 609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6090, and continue the process.

Moving on to step 13:
643 can be fit into 6090 9 times, resulting in a remainder of 303.
Put 9 as the next digit of the answer. 
Result so far: 155044.92379
If we subtract 5787 from 6090, we get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Advancing to step 14:
643 goes into 3030 4 times with a remainder of 458.
Put 4 as the next digit of the answer. 
Result so far: 155044.923794
Deduct 2572 from 3030 and we're left with 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

Let's proceed to step 15:
643 goes into 4580 7 times with a remainder of 79.
Write down 7 as next digit of the result. 
Result so far: 155044.9237947
Subtracting 4501 from 4580 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 16:
643 can be fit into 790 1 times, resulting in a remainder of 147.
Put 1 as the next digit of the answer. 
Result so far: 155044.92379471
Deduct 643 from 790 and we're left with 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Our division results in 155044.92379471 with a remaining 1.47e-07.