Let's divide 53877389 by 209
We're looking to find how many times 209 goes into 53877389.

On to step 1:
The number 209 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 209

On to step 2:
If we divide 53 by 209, we get 0 and a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Bring next digit (8) of the dividend behind the 53 and repeat the process: 538 / 209

On to step 3:
When dividing 538 by 209, we get 2 with a remainder of 120.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 418 from 538 leaves us with 120.
Grab the next digit (7) from the dividend, add it to 120, then carry on: 1207 / 209

Moving on to step 4:
When dividing 1207 by 209, we get 5 with a remainder of 162.
Put 5 as the next digit of the answer. 
Result so far: 25.0
The remainder is 162 after subtracting 1045 from 1207.
Take the next digit (7) from the dividend and append it to 162, then repeat: 1627 / 209

On to step 5:
When dividing 1627 by 209, we get 7 with a remainder of 164.
Record the quotient 7 as the next digit in the result. 
Result so far: 257.0
Subtract 1463 from 1627 to get 164.
Append the next digit (3) from the dividend to 164 and continue with: 1643 / 209

On to step 6:
1643 divided by 209 is 7 with a remainder of 180.
Use 7 as the next digit of our solution. 
Result so far: 2577.0
The remainder is 180 after subtracting 1463 from 1643.
Grab the next digit (8) from the dividend, add it to 180, then carry on: 1808 / 209

Advancing to step 7:
If we divide 1808 by 209, we get 8 and a remainder of 136.
Put 8 as the next digit of the answer. 
Result so far: 25778.0
Subtract 1672 from 1808 to get 136.
Bring next digit (9) of the dividend behind the 136 and repeat the process: 1369 / 209

On to step 8:
The number 209 fits into 1369 6 times, leaving a remainder of 115.
Write down 6 as next digit of the result. 
Result so far: 257786.0
Subtract 1254 from 1369 to get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Going ahead to step 9:
1150 divided by 209 is 5 with a remainder of 105.
Write down 5 as next digit of the result. 
Result so far: 257786.5
If we take 1045 away from 1150, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Step 10:
If we divide 1050 by 209, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 257786.55
Subtract 1045 from 1050 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 257786.55 with a remainder of 0.005.