688440 ÷ 57 
Let's see how many times 57 fits into 688440.

Step 1:
6 divided by 57 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 57

Advancing to step 2:
57 goes into 68 1 times with a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 57 from 68 to get 11.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 57

Step 3:
The number 57 fits into 118 2 times, leaving a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 114 from 118 leaves us with 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 57

Step 4:
When dividing 44 by 57, we get 0 with a remainder of 44.
Use 0 as the next digit of our solution. 
Result so far: 120.0
If we subtract 0 from 44, we get 44.
Append the next digit (4) from the dividend to 44 and continue with: 444 / 57

Let's proceed to step 5:
When dividing 444 by 57, we get 7 with a remainder of 45.
Use 7 as the next digit of our solution. 
Result so far: 1207.0
Subtract 399 from 444 to get 45.
Grab the next digit (0) from the dividend, add it to 45, then carry on: 450 / 57

Advancing to step 6:
450 divided by 57 is 7 with a remainder of 51.
Use 7 as the next digit of our solution. 
Result so far: 12077.0
If we take 399 away from 450, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 7:
When dividing 510 by 57, we get 8 with a remainder of 54.
Use 8 as the next digit of our solution. 
Result so far: 12077.8
The remainder is 54 after subtracting 456 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 8:
540 divided by 57 is 9 with a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 12077.89
The remainder is 27 after subtracting 513 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 9:
The number 57 fits into 270 4 times, leaving a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 12077.894
Subtracting 228 from 270 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 10:
The number 57 fits into 420 7 times, leaving a remainder of 21.
Put 7 as the next digit of the answer. 
Result so far: 12077.8947
If we subtract 399 from 420, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 11:
When dividing 210 by 57, we get 3 with a remainder of 39.
The next digit of our result is 3. 
Result so far: 12077.89473
If we subtract 171 from 210, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 12:
The number 57 fits into 390 6 times, leaving a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 12077.894736
If we take 342 away from 390, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 13:
480 divided by 57 is 8 with a remainder of 24.
The next digit of our result is 8. 
Result so far: 12077.8947368
Subtracting 456 from 480 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 14:
If we divide 240 by 57, we get 4 and a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 12077.89473684
If we subtract 228 from 240, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 12077.89473684 with a remainder of 1.2e-08.