Let's divide 39925372 by 407
The aim is to understand the frequency of 407 in 39925372.

Moving on to step 1:
3 divided by 407 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 407

Advancing to step 2:
39 divided by 407 is 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 407

Advancing to step 3:
When dividing 399 by 407, we get 0 with a remainder of 399.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 399, we end up with 399.
Bring next digit (2) of the dividend behind the 399 and repeat the process: 3992 / 407

On to step 4:
If we divide 3992 by 407, we get 9 and a remainder of 329.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 3663 from 3992 to get 329.
Fetch the next digit (5) from the dividend, attach it to 329 and continue: 3295 / 407

Advancing to step 5:
When dividing 3295 by 407, we get 8 with a remainder of 39.
Put 8 as the next digit of the answer. 
Result so far: 98.0
The remainder is 39 after subtracting 3256 from 3295.
Bring next digit (3) of the dividend behind the 39 and repeat the process: 393 / 407

Going ahead to step 6:
When dividing 393 by 407, we get 0 with a remainder of 393.
Write down 0 as next digit of the result. 
Result so far: 980.0
Subtracting 0 from 393 leaves us with 393.
Grab the next digit (7) from the dividend, add it to 393, then carry on: 3937 / 407

Advancing to step 7:
407 goes into 3937 9 times with a remainder of 274.
The next digit of our result is 9. 
Result so far: 9809.0
The remainder is 274 after subtracting 3663 from 3937.
Take the next digit (2) from the dividend and append it to 274, then repeat: 2742 / 407

Advancing to step 8:
If we divide 2742 by 407, we get 6 and a remainder of 300.
Record the quotient 6 as the next digit in the result. 
Result so far: 98096.0
Deduct 2442 from 2742 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Moving on to step 9:
3000 divided by 407 is 7 with a remainder of 151.
Use 7 as the next digit of our solution. 
Result so far: 98096.7
If we take 2849 away from 3000, we end up with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Advancing to step 10:
When dividing 1510 by 407, we get 3 with a remainder of 289.
Put 3 as the next digit of the answer. 
Result so far: 98096.73
Subtract 1221 from 1510 to get 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

On to step 11:
If we divide 2890 by 407, we get 7 and a remainder of 41.
Record the quotient 7 as the next digit in the result. 
Result so far: 98096.737
Deduct 2849 from 2890 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 12:
407 goes into 410 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 98096.7371
The remainder is 3 after subtracting 407 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 13:
When dividing 30 by 407, we get 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 98096.7371
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 14:
407 can be fit into 300 0 times, resulting in a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 98096.7371
Deduct 0 from 300 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 98096.7371, with a leftover of 3e-05.