70102352 ÷ 787 
The aim is to understand the frequency of 787 in 70102352.

On to step 1:
If we divide 7 by 787, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 787

Moving on to step 2:
70 divided by 787 is 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 70 after subtracting 0 from 70.
Grab the next digit (1) from the dividend, add it to 70, then carry on: 701 / 787

On to step 3:
The number 787 fits into 701 0 times, leaving a remainder of 701.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 701 to get 701.
Include the next digit (0) from the dividend after 701, then repeat: 7010 / 787

On to step 4:
787 can be fit into 7010 8 times, resulting in a remainder of 714.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 6296 from 7010, we get 714.
Bring next digit (2) of the dividend behind the 714 and repeat the process: 7142 / 787

Going ahead to step 5:
When dividing 7142 by 787, we get 9 with a remainder of 59.
Use 9 as the next digit of our solution. 
Result so far: 89.0
If we take 7083 away from 7142, we end up with 59.
Include the next digit (3) from the dividend after 59, then repeat: 593 / 787

Advancing to step 6:
787 can be fit into 593 0 times, resulting in a remainder of 593.
The number 0 becomes the next digit in our result. 
Result so far: 890.0
The remainder is 593 after subtracting 0 from 593.
Grab the next digit (5) from the dividend, add it to 593, then carry on: 5935 / 787

Advancing to step 7:
787 can be fit into 5935 7 times, resulting in a remainder of 426.
Record the quotient 7 as the next digit in the result. 
Result so far: 8907.0
Subtracting 5509 from 5935 leaves us with 426.
Append the next digit (2) from the dividend to 426 and continue with: 4262 / 787

Moving on to step 8:
4262 divided by 787 is 5 with a remainder of 327.
The next digit of our result is 5. 
Result so far: 89075.0
If we take 3935 away from 4262, we end up with 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Advancing to step 9:
787 goes into 3270 4 times with a remainder of 122.
Write down 4 as next digit of the result. 
Result so far: 89075.4
The remainder is 122 after subtracting 3148 from 3270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

On to step 10:
1220 divided by 787 is 1 with a remainder of 433.
Use 1 as the next digit of our solution. 
Result so far: 89075.41
If we subtract 787 from 1220, we get 433.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

Going ahead to step 11:
4330 divided by 787 is 5 with a remainder of 395.
The next digit of our result is 5. 
Result so far: 89075.415
Deduct 3935 from 4330 and we're left 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.

Going ahead to step 12:
787 goes into 3950 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 89075.4155
Deduct 3935 from 3950 and we're left with 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 89075.4155 with a remainder of 0.00015.