We look at the division of 84152086 by 451 
We're looking to find how many times 451 goes into 84152086.

Let's proceed to step 1:
451 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 451

On to step 2:
84 divided by 451 is 0 with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 84 leaves us with 84.
Append the next digit (1) from the dividend to 84 and continue with: 841 / 451

Moving on to step 3:
If we divide 841 by 451, we get 1 and a remainder of 390.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 451 from 841 and we're left with 390.
Bring next digit (5) of the dividend behind the 390 and repeat the process: 3905 / 451

Step 4:
451 can be fit into 3905 8 times, resulting in a remainder of 297.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Deduct 3608 from 3905 and we're left with 297.
Bring next digit (2) of the dividend behind the 297 and repeat the process: 2972 / 451

Advancing to step 5:
If we divide 2972 by 451, we get 6 and a remainder of 266.
Use 6 as the next digit of our solution. 
Result so far: 186.0
If we subtract 2706 from 2972, we get 266.
Grab the next digit (0) from the dividend, add it to 266, then carry on: 2660 / 451

Step 6:
451 goes into 2660 5 times with a remainder of 405.
The number 5 becomes the next digit in our result. 
Result so far: 1865.0
If we subtract 2255 from 2660, we get 405.
Fetch the next digit (8) from the dividend, attach it to 405 and continue: 4058 / 451

On to step 7:
451 can be fit into 4058 8 times, resulting in a remainder of 450.
The next digit of our result is 8. 
Result so far: 18658.0
Subtract 3608 from 4058 to get 450.
Bring next digit (6) of the dividend behind the 450 and repeat the process: 4506 / 451

Step 8:
If we divide 4506 by 451, we get 9 and a remainder of 447.
Write down 9 as next digit of the result. 
Result so far: 186589.0
If we subtract 4059 from 4506, we get 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

On to step 9:
451 goes into 4470 9 times with a remainder of 411.
The number 9 becomes the next digit in our result. 
Result so far: 186589.9
Subtracting 4059 from 4470 leaves us with 411.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4110, and continue the process.

Step 10:
451 can be fit into 4110 9 times, resulting in a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 186589.99
The remainder is 51 after subtracting 4059 from 4110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

The quotient of the division is 186589.99, and the remainder is 0.051.