65801545 divided by 407 
The aim is to understand the frequency of 407 in 65801545.

Advancing to step 1:
If we divide 6 by 407, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 407

Let's proceed to step 2:
When dividing 65 by 407, we get 0 with a remainder of 65.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 65, we get 65.
Take the next digit (8) from the dividend and append it to 65, then repeat: 658 / 407

Advancing to step 3:
658 divided by 407 is 1 with a remainder of 251.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 407 away from 658, we end up with 251.
Include the next digit (0) from the dividend after 251, then repeat: 2510 / 407

On to step 4:
2510 divided by 407 is 6 with a remainder of 68.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we take 2442 away from 2510, we end up with 68.
Append the next digit (1) from the dividend to 68 and continue with: 681 / 407

On to step 5:
When dividing 681 by 407, we get 1 with a remainder of 274.
Record the quotient 1 as the next digit in the result. 
Result so far: 161.0
The remainder is 274 after subtracting 407 from 681.
Include the next digit (5) from the dividend after 274, then repeat: 2745 / 407

Moving on to step 6:
407 can be fit into 2745 6 times, resulting in a remainder of 303.
Put 6 as the next digit of the answer. 
Result so far: 1616.0
Deduct 2442 from 2745 and we're left with 303.
Bring next digit (4) of the dividend behind the 303 and repeat the process: 3034 / 407

Step 7:
The number 407 fits into 3034 7 times, leaving a remainder of 185.
The number 7 becomes the next digit in our result. 
Result so far: 16167.0
Subtracting 2849 from 3034 leaves us with 185.
Bring next digit (5) of the dividend behind the 185 and repeat the process: 1855 / 407

Going ahead to step 8:
The number 407 fits into 1855 4 times, leaving a remainder of 227.
The next digit of our result is 4. 
Result so far: 161674.0
Deduct 1628 from 1855 and we're left with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Advancing to step 9:
2270 divided by 407 is 5 with a remainder of 235.
Put 5 as the next digit of the answer. 
Result so far: 161674.5
The remainder is 235 after subtracting 2035 from 2270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Let's proceed to step 10:
407 goes into 2350 5 times with a remainder of 315.
Write down 5 as next digit of the result. 
Result so far: 161674.55
Subtracting 2035 from 2350 leaves us with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

After the division, we end up with 161674.55 and a remainder of 0.315.