We divide 39890721 by 578
The aim is to understand the frequency of 578 in 39890721.

Going ahead to step 1:
The number 578 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 578

On to step 2:
When dividing 39 by 578, we get 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Bring next digit (8) of the dividend behind the 39 and repeat the process: 398 / 578

Going ahead to step 3:
When dividing 398 by 578, we get 0 with a remainder of 398.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 398 to get 398.
Bring next digit (9) of the dividend behind the 398 and repeat the process: 3989 / 578

Let's proceed to step 4:
The number 578 fits into 3989 6 times, leaving a remainder of 521.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 3468 from 3989 leaves us with 521.
Fetch the next digit (0) from the dividend, attach it to 521 and continue: 5210 / 578

Advancing to step 5:
578 goes into 5210 9 times with a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 69.0
Deduct 5202 from 5210 and we're left with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 578

Advancing to step 6:
If we divide 87 by 578, we get 0 and a remainder of 87.
The next digit of our result is 0. 
Result so far: 690.0
Deduct 0 from 87 and we're left with 87.
Bring next digit (2) of the dividend behind the 87 and repeat the process: 872 / 578

On to step 7:
If we divide 872 by 578, we get 1 and a remainder of 294.
Write down 1 as next digit of the result. 
Result so far: 6901.0
Deduct 578 from 872 and we're left with 294.
Append the next digit (1) from the dividend to 294 and continue with: 2941 / 578

Moving on to step 8:
When dividing 2941 by 578, we get 5 with a remainder of 51.
The number 5 becomes the next digit in our result. 
Result so far: 69015.0
The remainder is 51 after subtracting 2890 from 2941.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 9:
510 divided by 578 is 0 with a remainder of 510.
Write down 0 as next digit of the result. 
Result so far: 69015.0
If we take 0 away from 510, we end up with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Let's proceed to step 10:
If we divide 5100 by 578, we get 8 and a remainder of 476.
Put 8 as the next digit of the answer. 
Result so far: 69015.08
The remainder is 476 after subtracting 4624 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Going ahead to step 11:
4760 divided by 578 is 8 with a remainder of 136.
Use 8 as the next digit of our solution. 
Result so far: 69015.088
Deduct 4624 from 4760 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

The quotient of the division is 69015.088, and the remainder is 0.0136.