Let's divide 77020849 by 639
The aim is to understand the frequency of 639 in 77020849.

Step 1:
7 divided by 639 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 639

Let's proceed to step 2:
77 divided by 639 is 0 with a remainder of 77.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Grab the next digit (0) from the dividend, add it to 77, then carry on: 770 / 639

Step 3:
The number 639 fits into 770 1 times, leaving a remainder of 131.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 639 from 770, we get 131.
Grab the next digit (2) from the dividend, add it to 131, then carry on: 1312 / 639

On to step 4:
When dividing 1312 by 639, we get 2 with a remainder of 34.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we subtract 1278 from 1312, we get 34.
Fetch the next digit (0) from the dividend, attach it to 34 and continue: 340 / 639

Let's proceed to step 5:
639 can be fit into 340 0 times, resulting in a remainder of 340.
Write down 0 as next digit of the result. 
Result so far: 120.0
If we take 0 away from 340, we end up with 340.
Bring next digit (8) of the dividend behind the 340 and repeat the process: 3408 / 639

Let's proceed to step 6:
639 goes into 3408 5 times with a remainder of 213.
The next digit of our result is 5. 
Result so far: 1205.0
If we take 3195 away from 3408, we end up with 213.
Take the next digit (4) from the dividend and append it to 213, then repeat: 2134 / 639

Step 7:
2134 divided by 639 is 3 with a remainder of 217.
Put 3 as the next digit of the answer. 
Result so far: 12053.0
Subtracting 1917 from 2134 leaves us with 217.
Take the next digit (9) from the dividend and append it to 217, then repeat: 2179 / 639

Step 8:
639 can be fit into 2179 3 times, resulting in a remainder of 262.
Write down 3 as next digit of the result. 
Result so far: 120533.0
The remainder is 262 after subtracting 1917 from 2179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Advancing to step 9:
The number 639 fits into 2620 4 times, leaving a remainder of 64.
Put 4 as the next digit of the answer. 
Result so far: 120533.4
Deduct 2556 from 2620 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 10:
640 divided by 639 is 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 120533.41
Deduct 639 from 640 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 11:
The number 639 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 120533.41
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
When dividing 100 by 639, we get 0 with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 120533.41
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The quotient of the division is 120533.41, and the remainder is 0.001.