86485617 divided by 401 
The aim is to understand the frequency of 401 in 86485617.

On to step 1:
The number 401 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 401

On to step 2:
If we divide 86 by 401, we get 0 and a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Bring next digit (4) of the dividend behind the 86 and repeat the process: 864 / 401

Let's proceed to step 3:
The number 401 fits into 864 2 times, leaving a remainder of 62.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 62 after subtracting 802 from 864.
Bring next digit (8) of the dividend behind the 62 and repeat the process: 628 / 401

Moving on to step 4:
401 goes into 628 1 times with a remainder of 227.
Write down 1 as next digit of the result. 
Result so far: 21.0
If we subtract 401 from 628, we get 227.
Grab the next digit (5) from the dividend, add it to 227, then carry on: 2275 / 401

On to step 5:
401 goes into 2275 5 times with a remainder of 270.
Put 5 as the next digit of the answer. 
Result so far: 215.0
The remainder is 270 after subtracting 2005 from 2275.
Fetch the next digit (6) from the dividend, attach it to 270 and continue: 2706 / 401

Advancing to step 6:
If we divide 2706 by 401, we get 6 and a remainder of 300.
Put 6 as the next digit of the answer. 
Result so far: 2156.0
Deduct 2406 from 2706 and we're left with 300.
Grab the next digit (1) from the dividend, add it to 300, then carry on: 3001 / 401

Moving on to step 7:
The number 401 fits into 3001 7 times, leaving a remainder of 194.
Write down 7 as next digit of the result. 
Result so far: 21567.0
Deduct 2807 from 3001 and we're left with 194.
Take the next digit (7) from the dividend and append it to 194, then repeat: 1947 / 401

Step 8:
When dividing 1947 by 401, we get 4 with a remainder of 343.
Record the quotient 4 as the next digit in the result. 
Result so far: 215674.0
Subtract 1604 from 1947 to get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Going ahead to step 9:
3430 divided by 401 is 8 with a remainder of 222.
The number 8 becomes the next digit in our result. 
Result so far: 215674.8
If we subtract 3208 from 3430, we get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Going ahead to step 10:
401 goes into 2220 5 times with a remainder of 215.
Record the quotient 5 as the next digit in the result. 
Result so far: 215674.85
If we take 2005 away from 2220, we end up with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Step 11:
The number 401 fits into 2150 5 times, leaving a remainder of 145.
Write down 5 as next digit of the result. 
Result so far: 215674.855
If we take 2005 away from 2150, we end up with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Our division results in 215674.855 with a remaining 0.0145.