We look at the division of 66709355 by 839 
Our goal is to divide 66709355 by 839.

Moving on to step 1:
When dividing 6 by 839, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 839

Moving on to step 2:
When dividing 66 by 839, we get 0 with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Grab the next digit (7) from the dividend, add it to 66, then carry on: 667 / 839

Going ahead to step 3:
839 goes into 667 0 times with a remainder of 667.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 667, we get 667.
Append the next digit (0) from the dividend to 667 and continue with: 6670 / 839

Advancing to step 4:
6670 divided by 839 is 7 with a remainder of 797.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 5873 away from 6670, we end up with 797.
Include the next digit (9) from the dividend after 797, then repeat: 7979 / 839

Let's proceed to step 5:
The number 839 fits into 7979 9 times, leaving a remainder of 428.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
Subtract 7551 from 7979 to get 428.
Append the next digit (3) from the dividend to 428 and continue with: 4283 / 839

Going ahead to step 6:
When dividing 4283 by 839, we get 5 with a remainder of 88.
Write down 5 as next digit of the result. 
Result so far: 795.0
Subtract 4195 from 4283 to get 88.
Include the next digit (5) from the dividend after 88, then repeat: 885 / 839

Going ahead to step 7:
The number 839 fits into 885 1 times, leaving a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 7951.0
The remainder is 46 after subtracting 839 from 885.
Take the next digit (5) from the dividend and append it to 46, then repeat: 465 / 839

Step 8:
If we divide 465 by 839, we get 0 and a remainder of 465.
The next digit of our result is 0. 
Result so far: 79510.0
If we subtract 0 from 465, we get 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Moving on to step 9:
If we divide 4650 by 839, we get 5 and a remainder of 455.
Use 5 as the next digit of our solution. 
Result so far: 79510.5
The remainder is 455 after subtracting 4195 from 4650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4550, and continue the process.

Step 10:
When dividing 4550 by 839, we get 5 with a remainder of 355.
The number 5 becomes the next digit in our result. 
Result so far: 79510.55
If we subtract 4195 from 4550, we get 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

The final outcome is 79510.55, with a leftover of 0.355.