We divide 15366887 by 643
The aim is to understand the frequency of 643 in 15366887.

Let's proceed to step 1:
643 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 643

Let's proceed to step 2:
The number 643 fits into 15 0 times, leaving a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Take the next digit (3) from the dividend and append it to 15, then repeat: 153 / 643

Going ahead to step 3:
If we divide 153 by 643, we get 0 and a remainder of 153.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 153 to get 153.
Include the next digit (6) from the dividend after 153, then repeat: 1536 / 643

Let's proceed to step 4:
1536 divided by 643 is 2 with a remainder of 250.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 1286 from 1536 leaves us with 250.
Grab the next digit (6) from the dividend, add it to 250, then carry on: 2506 / 643

Going ahead to step 5:
If we divide 2506 by 643, we get 3 and a remainder of 577.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
If we subtract 1929 from 2506, we get 577.
Grab the next digit (8) from the dividend, add it to 577, then carry on: 5778 / 643

Advancing to step 6:
643 goes into 5778 8 times with a remainder of 634.
Use 8 as the next digit of our solution. 
Result so far: 238.0
Deduct 5144 from 5778 and we're left with 634.
Fetch the next digit (8) from the dividend, attach it to 634 and continue: 6348 / 643

Let's proceed to step 7:
When dividing 6348 by 643, we get 9 with a remainder of 561.
Write down 9 as next digit of the result. 
Result so far: 2389.0
Subtracting 5787 from 6348 leaves us with 561.
Append the next digit (7) from the dividend to 561 and continue with: 5617 / 643

Moving on to step 8:
5617 divided by 643 is 8 with a remainder of 473.
The number 8 becomes the next digit in our result. 
Result so far: 23898.0
Subtract 5144 from 5617 to get 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Going ahead to step 9:
643 goes into 4730 7 times with a remainder of 229.
Put 7 as the next digit of the answer. 
Result so far: 23898.7
Subtract 4501 from 4730 to get 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

On to step 10:
643 goes into 2290 3 times with a remainder of 361.
Put 3 as the next digit of the answer. 
Result so far: 23898.73
Deduct 1929 from 2290 and we're left with 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Step 11:
643 can be fit into 3610 5 times, resulting in a remainder of 395.
Record the quotient 5 as the next digit in the result. 
Result so far: 23898.735
If we take 3215 away from 3610, we end up with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Step 12:
If we divide 3950 by 643, we get 6 and a remainder of 92.
Write down 6 as next digit of the result. 
Result so far: 23898.7356
If we take 3858 away from 3950, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 13:
920 divided by 643 is 1 with a remainder of 277.
Write down 1 as next digit of the result. 
Result so far: 23898.73561
Subtracting 643 from 920 leaves us with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Step 14:
2770 divided by 643 is 4 with a remainder of 198.
Use 4 as the next digit of our solution. 
Result so far: 23898.735614
Deduct 2572 from 2770 and we're left with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Step 15:
When dividing 1980 by 643, we get 3 with a remainder of 51.
The next digit of our result is 3. 
Result so far: 23898.7356143
Deduct 1929 from 1980 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 16:
The number 643 fits into 510 0 times, leaving a remainder of 510.
Use 0 as the next digit of our solution. 
Result so far: 23898.7356143
If we subtract 0 from 510, we get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Our division results in 23898.7356143 with a remaining 5.1e-07.