670440 ÷ 87 
The aim is to understand the frequency of 87 in 670440.

Step 1:
When dividing 6 by 87, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (7) of the dividend behind the 6 and repeat the process: 67 / 87

Step 2:
When dividing 67 by 87, we get 0 with a remainder of 67.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 67, we end up with 67.
Append the next digit (0) from the dividend to 67 and continue with: 670 / 87

Moving on to step 3:
670 divided by 87 is 7 with a remainder of 61.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 609 from 670 and we're left with 61.
Fetch the next digit (4) from the dividend, attach it to 61 and continue: 614 / 87

On to step 4:
614 divided by 87 is 7 with a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 77.0
Subtract 609 from 614 to get 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 87

Going ahead to step 5:
54 divided by 87 is 0 with a remainder of 54.
Record the quotient 0 as the next digit in the result. 
Result so far: 770.0
Subtract 0 from 54 to get 54.
Bring next digit (0) of the dividend behind the 54 and repeat the process: 540 / 87

Step 6:
540 divided by 87 is 6 with a remainder of 18.
The next digit of our result is 6. 
Result so far: 7706.0
If we subtract 522 from 540, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 7:
87 goes into 180 2 times with a remainder of 6.
The next digit of our result is 2. 
Result so far: 7706.2
If we take 174 away from 180, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
87 can be fit into 60 0 times, resulting in a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 7706.2
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
If we divide 600 by 87, we get 6 and a remainder of 78.
Use 6 as the next digit of our solution. 
Result so far: 7706.206
The remainder is 78 after subtracting 522 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 10:
780 divided by 87 is 8 with a remainder of 84.
Record the quotient 8 as the next digit in the result. 
Result so far: 7706.2068
Subtracting 696 from 780 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 11:
87 goes into 840 9 times with a remainder of 57.
The next digit of our result is 9. 
Result so far: 7706.20689
The remainder is 57 after subtracting 783 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 12:
570 divided by 87 is 6 with a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 7706.206896
Subtract 522 from 570 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 13:
87 can be fit into 480 5 times, resulting in a remainder of 45.
The next digit of our result is 5. 
Result so far: 7706.2068965
Subtracting 435 from 480 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 14:
87 goes into 450 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 7706.20689655
If we subtract 435 from 450, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 7706.20689655 with a remainder of 1.5e-08.