We're dividing 40873621 by 654 
The aim is to understand the frequency of 654 in 40873621.

Advancing to step 1:
When dividing 4 by 654, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 654

Advancing to step 2:
654 can be fit into 40 0 times, resulting in a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Bring next digit (8) of the dividend behind the 40 and repeat the process: 408 / 654

Let's proceed to step 3:
408 divided by 654 is 0 with a remainder of 408.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 408, we get 408.
Grab the next digit (7) from the dividend, add it to 408, then carry on: 4087 / 654

Moving on to step 4:
If we divide 4087 by 654, we get 6 and a remainder of 163.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 3924 from 4087, we get 163.
Include the next digit (3) from the dividend after 163, then repeat: 1633 / 654

Going ahead to step 5:
1633 divided by 654 is 2 with a remainder of 325.
Write down 2 as next digit of the result. 
Result so far: 62.0
If we subtract 1308 from 1633, we get 325.
Include the next digit (6) from the dividend after 325, then repeat: 3256 / 654

Advancing to step 6:
When dividing 3256 by 654, we get 4 with a remainder of 640.
Write down 4 as next digit of the result. 
Result so far: 624.0
The remainder is 640 after subtracting 2616 from 3256.
Bring next digit (2) of the dividend behind the 640 and repeat the process: 6402 / 654

Advancing to step 7:
When dividing 6402 by 654, we get 9 with a remainder of 516.
The next digit of our result is 9. 
Result so far: 6249.0
The remainder is 516 after subtracting 5886 from 6402.
Grab the next digit (1) from the dividend, add it to 516, then carry on: 5161 / 654

Moving on to step 8:
If we divide 5161 by 654, we get 7 and a remainder of 583.
Use 7 as the next digit of our solution. 
Result so far: 62497.0
Subtracting 4578 from 5161 leaves us with 583.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

Moving on to step 9:
654 can be fit into 5830 8 times, resulting in a remainder of 598.
Write down 8 as next digit of the result. 
Result so far: 62497.8
If we subtract 5232 from 5830, we get 598.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

Moving on to step 10:
If we divide 5980 by 654, we get 9 and a remainder of 94.
The number 9 becomes the next digit in our result. 
Result so far: 62497.89
Deduct 5886 from 5980 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Moving on to step 11:
If we divide 940 by 654, we get 1 and a remainder of 286.
Use 1 as the next digit of our solution. 
Result so far: 62497.891
If we subtract 654 from 940, we get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Advancing to step 12:
When dividing 2860 by 654, we get 4 with a remainder of 244.
The number 4 becomes the next digit in our result. 
Result so far: 62497.8914
Subtract 2616 from 2860 to get 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 13:
654 goes into 2440 3 times with a remainder of 478.
Put 3 as the next digit of the answer. 
Result so far: 62497.89143
The remainder is 478 after subtracting 1962 from 2440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Let's proceed to step 14:
654 can be fit into 4780 7 times, resulting in a remainder of 202.
The next digit of our result is 7. 
Result so far: 62497.891437
If we take 4578 away from 4780, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Let's proceed to step 15:
654 can be fit into 2020 3 times, resulting in a remainder of 58.
The next digit of our result is 3. 
Result so far: 62497.8914373
Subtracting 1962 from 2020 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 16:
580 divided by 654 is 0 with a remainder of 580.
The number 0 becomes the next digit in our result. 
Result so far: 62497.8914373
The remainder is 580 after subtracting 0 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

After the division, we end up with 62497.8914373 and a remainder of 5.8e-07.