87973813 divided by 286 
The aim is to understand the frequency of 286 in 87973813.

Let's proceed to step 1:
8 divided by 286 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 286

Going ahead to step 2:
The number 286 fits into 87 0 times, leaving a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 87 after subtracting 0 from 87.
Take the next digit (9) from the dividend and append it to 87, then repeat: 879 / 286

Moving on to step 3:
879 divided by 286 is 3 with a remainder of 21.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 858 from 879 to get 21.
Include the next digit (7) from the dividend after 21, then repeat: 217 / 286

Step 4:
The number 286 fits into 217 0 times, leaving a remainder of 217.
Use 0 as the next digit of our solution. 
Result so far: 30.0
If we subtract 0 from 217, we get 217.
Append the next digit (3) from the dividend to 217 and continue with: 2173 / 286

Step 5:
286 can be fit into 2173 7 times, resulting in a remainder of 171.
Write down 7 as next digit of the result. 
Result so far: 307.0
Deduct 2002 from 2173 and we're left with 171.
Grab the next digit (8) from the dividend, add it to 171, then carry on: 1718 / 286

Going ahead to step 6:
1718 divided by 286 is 6 with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 3076.0
If we take 1716 away from 1718, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 286

On to step 7:
If we divide 21 by 286, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 30760.0
If we subtract 0 from 21, we get 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 286

Step 8:
The number 286 fits into 213 0 times, leaving a remainder of 213.
Put 0 as the next digit of the answer. 
Result so far: 307600.0
The remainder is 213 after subtracting 0 from 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Going ahead to step 9:
When dividing 2130 by 286, we get 7 with a remainder of 128.
Write down 7 as next digit of the result. 
Result so far: 307600.7
If we take 2002 away from 2130, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 10:
If we divide 1280 by 286, we get 4 and a remainder of 136.
Record the quotient 4 as the next digit in the result. 
Result so far: 307600.74
The remainder is 136 after subtracting 1144 from 1280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 11:
286 goes into 1360 4 times with a remainder of 216.
Use 4 as the next digit of our solution. 
Result so far: 307600.744
If we take 1144 away from 1360, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

The quotient of the division is 307600.744, and the remainder is 0.0216.