209989 ÷ 57 
Our goal is to divide 209989 by 57.

Advancing to step 1:
The number 57 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 57

Moving on to step 2:
The number 57 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Bring next digit (9) of the dividend behind the 20 and repeat the process: 209 / 57

Going ahead to step 3:
57 goes into 209 3 times with a remainder of 38.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 171 from 209 and we're left with 38.
Append the next digit (9) from the dividend to 38 and continue with: 389 / 57

Advancing to step 4:
The number 57 fits into 389 6 times, leaving a remainder of 47.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtract 342 from 389 to get 47.
Bring next digit (8) of the dividend behind the 47 and repeat the process: 478 / 57

Step 5:
478 divided by 57 is 8 with a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 368.0
If we subtract 456 from 478, we get 22.
Take the next digit (9) from the dividend and append it to 22, then repeat: 229 / 57

Let's proceed to step 6:
The number 57 fits into 229 4 times, leaving a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 3684.0
Deduct 228 from 229 and we're left 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.

On to step 7:
The number 57 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 3684.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 57 fits into 100 1 times, leaving a remainder of 43.
The number 1 becomes the next digit in our result. 
Result so far: 3684.01
Subtract 57 from 100 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 9:
The number 57 fits into 430 7 times, leaving a remainder of 31.
Put 7 as the next digit of the answer. 
Result so far: 3684.017
Deduct 399 from 430 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 10:
The number 57 fits into 310 5 times, leaving a remainder of 25.
The next digit of our result is 5. 
Result so far: 3684.0175
If we take 285 away from 310, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 11:
If we divide 250 by 57, we get 4 and a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 3684.01754
Subtracting 228 from 250 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 12:
The number 57 fits into 220 3 times, leaving a remainder of 49.
The number 3 becomes the next digit in our result. 
Result so far: 3684.017543
The remainder is 49 after subtracting 171 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 13:
57 goes into 490 8 times with a remainder of 34.
The number 8 becomes the next digit in our result. 
Result so far: 3684.0175438
If we subtract 456 from 490, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 14:
57 can be fit into 340 5 times, resulting in a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 3684.01754385
If we subtract 285 from 340, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

The final outcome is 3684.01754385, with a leftover of 5.5e-08.