Let's divide 83900424 by 409
We want to divide 83900424 by 409.

On to step 1:
The number 409 fits into 8 0 times, leaving 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.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 409

Let's proceed to step 2:
When dividing 83 by 409, we get 0 with a remainder of 83.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Take the next digit (9) from the dividend and append it to 83, then repeat: 839 / 409

On to step 3:
409 goes into 839 2 times with a remainder of 21.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 818 from 839, we get 21.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 409

Advancing to step 4:
When dividing 210 by 409, we get 0 with a remainder of 210.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtracting 0 from 210 leaves us with 210.
Append the next digit (0) from the dividend to 210 and continue with: 2100 / 409

Let's proceed to step 5:
409 can be fit into 2100 5 times, resulting in a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 205.0
Subtract 2045 from 2100 to get 55.
Append the next digit (4) from the dividend to 55 and continue with: 554 / 409

Moving on to step 6:
If we divide 554 by 409, we get 1 and a remainder of 145.
Write down 1 as next digit of the result. 
Result so far: 2051.0
Deduct 409 from 554 and we're left with 145.
Fetch the next digit (2) from the dividend, attach it to 145 and continue: 1452 / 409

Advancing to step 7:
If we divide 1452 by 409, we get 3 and a remainder of 225.
The number 3 becomes the next digit in our result. 
Result so far: 20513.0
Subtracting 1227 from 1452 leaves us with 225.
Grab the next digit (4) from the dividend, add it to 225, then carry on: 2254 / 409

Let's proceed to step 8:
409 goes into 2254 5 times with a remainder of 209.
The next digit of our result is 5. 
Result so far: 205135.0
The remainder is 209 after subtracting 2045 from 2254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Advancing to step 9:
409 goes into 2090 5 times with a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 205135.5
Subtract 2045 from 2090 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 10:
409 goes into 450 1 times with a remainder of 41.
Use 1 as the next digit of our solution. 
Result so far: 205135.51
The remainder is 41 after subtracting 409 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 11:
409 can be fit into 410 1 times, resulting in a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 205135.511
Subtracting 409 from 410 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Our division results in 205135.511 with a remaining 0.0001.