We divide 402880 by 51
The aim is to understand the frequency of 51 in 402880.

Step 1:
When dividing 4 by 51, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 51

Let's proceed to step 2:
When dividing 40 by 51, we get 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Grab the next digit (2) from the dividend, add it to 40, then carry on: 402 / 51

Moving on to step 3:
If we divide 402 by 51, we get 7 and a remainder of 45.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 357 from 402 and we're left with 45.
Grab the next digit (8) from the dividend, add it to 45, then carry on: 458 / 51

Moving on to step 4:
51 goes into 458 8 times with a remainder of 50.
The next digit of our result is 8. 
Result so far: 78.0
The remainder is 50 after subtracting 408 from 458.
Take the next digit (8) from the dividend and append it to 50, then repeat: 508 / 51

Moving on to step 5:
508 divided by 51 is 9 with a remainder of 49.
The next digit of our result is 9. 
Result so far: 789.0
If we take 459 away from 508, we end up with 49.
Fetch the next digit (0) from the dividend, attach it to 49 and continue: 490 / 51

On to step 6:
If we divide 490 by 51, we get 9 and a remainder of 31.
The number 9 becomes the next digit in our result. 
Result so far: 7899.0
Subtracting 459 from 490 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 7:
51 can be fit into 310 6 times, resulting in a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 7899.6
Deduct 306 from 310 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
51 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 7899.6
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
The number 51 fits into 400 7 times, leaving a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 7899.607
Subtracting 357 from 400 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 10:
The number 51 fits into 430 8 times, leaving a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 7899.6078
Subtract 408 from 430 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 11:
51 goes into 220 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 7899.60784
If we subtract 204 from 220, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 12:
160 divided by 51 is 3 with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 7899.607843
If we subtract 153 from 160, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 13:
The number 51 fits into 70 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 7899.6078431
Deduct 51 from 70 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 14:
51 goes into 190 3 times with a remainder of 37.
Write down 3 as next digit of the result. 
Result so far: 7899.60784313
If we take 153 away from 190, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

The quotient of the division is 7899.60784313, and the remainder is 3.7e-08.