54635816 divided by 639 
The aim is to understand the frequency of 639 in 54635816.

Advancing to step 1:
If we divide 5 by 639, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 639

Going ahead to step 2:
When dividing 54 by 639, we get 0 with a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 54 to get 54.
Grab the next digit (6) from the dividend, add it to 54, then carry on: 546 / 639

On to step 3:
If we divide 546 by 639, we get 0 and a remainder of 546.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 546, we end up with 546.
Grab the next digit (3) from the dividend, add it to 546, then carry on: 5463 / 639

Step 4:
The number 639 fits into 5463 8 times, leaving a remainder of 351.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 351 after subtracting 5112 from 5463.
Fetch the next digit (5) from the dividend, attach it to 351 and continue: 3515 / 639

On to step 5:
If we divide 3515 by 639, we get 5 and a remainder of 320.
Use 5 as the next digit of our solution. 
Result so far: 85.0
Deduct 3195 from 3515 and we're left with 320.
Include the next digit (8) from the dividend after 320, then repeat: 3208 / 639

Going ahead to step 6:
639 goes into 3208 5 times with a remainder of 13.
Write down 5 as next digit of the result. 
Result so far: 855.0
Subtracting 3195 from 3208 leaves us with 13.
Grab the next digit (1) from the dividend, add it to 13, then carry on: 131 / 639

Going ahead to step 7:
The number 639 fits into 131 0 times, leaving a remainder of 131.
Record the quotient 0 as the next digit in the result. 
Result so far: 8550.0
Subtract 0 from 131 to get 131.
Take the next digit (6) from the dividend and append it to 131, then repeat: 1316 / 639

Step 8:
639 goes into 1316 2 times with a remainder of 38.
Record the quotient 2 as the next digit in the result. 
Result so far: 85502.0
If we take 1278 away from 1316, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 9:
380 divided by 639 is 0 with a remainder of 380.
Record the quotient 0 as the next digit in the result. 
Result so far: 85502.0
If we take 0 away from 380, we end up with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 10:
If we divide 3800 by 639, we get 5 and a remainder of 605.
Use 5 as the next digit of our solution. 
Result so far: 85502.05
If we subtract 3195 from 3800, we get 605.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

Let's proceed to step 11:
The number 639 fits into 6050 9 times, leaving a remainder of 299.
Use 9 as the next digit of our solution. 
Result so far: 85502.059
Deduct 5751 from 6050 and we're left with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Going ahead to step 12:
639 can be fit into 2990 4 times, resulting in a remainder of 434.
Use 4 as the next digit of our solution. 
Result so far: 85502.0594
If we take 2556 away from 2990, we end up with 434.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

Let's proceed to step 13:
639 goes into 4340 6 times with a remainder of 506.
Use 6 as the next digit of our solution. 
Result so far: 85502.05946
If we subtract 3834 from 4340, we get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Step 14:
When dividing 5060 by 639, we get 7 with a remainder of 587.
Record the quotient 7 as the next digit in the result. 
Result so far: 85502.059467
Subtracting 4473 from 5060 leaves us with 587.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5870, and continue the process.

Going ahead to step 15:
If we divide 5870 by 639, we get 9 and a remainder of 119.
The next digit of our result is 9. 
Result so far: 85502.0594679
Subtracting 5751 from 5870 leaves us with 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Going ahead to step 16:
1190 divided by 639 is 1 with a remainder of 551.
Record the quotient 1 as the next digit in the result. 
Result so far: 85502.05946791
Subtract 639 from 1190 to get 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5510, and continue the process.

Our division results in 85502.05946791 with a remaining 5.51e-07.