We divide 7843705 by 990
The aim is to understand the frequency of 990 in 7843705.

Advancing to step 1:
When dividing 7 by 990, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 990

On to step 2:
If we divide 78 by 990, we get 0 and a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Take the next digit (4) from the dividend and append it to 78, then repeat: 784 / 990

Moving on to step 3:
784 divided by 990 is 0 with a remainder of 784.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 784, we get 784.
Grab the next digit (3) from the dividend, add it to 784, then carry on: 7843 / 990

Step 4:
7843 divided by 990 is 7 with a remainder of 913.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 913 after subtracting 6930 from 7843.
Grab the next digit (7) from the dividend, add it to 913, then carry on: 9137 / 990

Advancing to step 5:
990 goes into 9137 9 times with a remainder of 227.
The number 9 becomes the next digit in our result. 
Result so far: 79.0
Subtracting 8910 from 9137 leaves us with 227.
Append the next digit (0) from the dividend to 227 and continue with: 2270 / 990

Let's proceed to step 6:
When dividing 2270 by 990, we get 2 with a remainder of 290.
The next digit of our result is 2. 
Result so far: 792.0
Subtract 1980 from 2270 to get 290.
Include the next digit (5) from the dividend after 290, then repeat: 2905 / 990

Let's proceed to step 7:
990 goes into 2905 2 times with a remainder of 925.
Put 2 as the next digit of the answer. 
Result so far: 7922.0
If we take 1980 away from 2905, we end up with 925.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9250, and continue the process.

Step 8:
9250 divided by 990 is 9 with a remainder of 340.
The next digit of our result is 9. 
Result so far: 7922.9
Subtracting 8910 from 9250 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Let's proceed to step 9:
The number 990 fits into 3400 3 times, leaving a remainder of 430.
Write down 3 as next digit of the result. 
Result so far: 7922.93
Subtracting 2970 from 3400 leaves us with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Step 10:
990 goes into 4300 4 times with a remainder of 340.
Write down 4 as next digit of the result. 
Result so far: 7922.934
If we take 3960 away from 4300, we end up with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

On to step 11:
When dividing 3400 by 990, we get 3 with a remainder of 430.
The number 3 becomes the next digit in our result. 
Result so far: 7922.9343
If we subtract 2970 from 3400, we get 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Advancing to step 12:
If we divide 4300 by 990, we get 4 and a remainder of 340.
Record the quotient 4 as the next digit in the result. 
Result so far: 7922.93434
Subtracting 3960 from 4300 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 13:
If we divide 3400 by 990, we get 3 and a remainder of 430.
The next digit of our result is 3. 
Result so far: 7922.934343
If we take 2970 away from 3400, we end up with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

On to step 14:
The number 990 fits into 4300 4 times, leaving a remainder of 340.
Use 4 as the next digit of our solution. 
Result so far: 7922.9343434
Subtracting 3960 from 4300 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 15:
The number 990 fits into 3400 3 times, leaving a remainder of 430.
The number 3 becomes the next digit in our result. 
Result so far: 7922.93434343
If we subtract 2970 from 3400, we get 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

After the division, we end up with 7922.93434343 and a remainder of 4.3e-07.