66904516 ÷ 170 
We want to divide 66904516 by 170.

Going ahead to step 1:
If we divide 6 by 170, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
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 / 170

Moving on to step 2:
170 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Bring next digit (9) of the dividend behind the 66 and repeat the process: 669 / 170

Going ahead to step 3:
170 goes into 669 3 times with a remainder of 159.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 510 away from 669, we end up with 159.
Grab the next digit (0) from the dividend, add it to 159, then carry on: 1590 / 170

On to step 4:
1590 divided by 170 is 9 with a remainder of 60.
The next digit of our result is 9. 
Result so far: 39.0
The remainder is 60 after subtracting 1530 from 1590.
Take the next digit (4) from the dividend and append it to 60, then repeat: 604 / 170

Going ahead to step 5:
The number 170 fits into 604 3 times, leaving a remainder of 94.
Record the quotient 3 as the next digit in the result. 
Result so far: 393.0
Subtracting 510 from 604 leaves us with 94.
Fetch the next digit (5) from the dividend, attach it to 94 and continue: 945 / 170

Let's proceed to step 6:
945 divided by 170 is 5 with a remainder of 95.
Put 5 as the next digit of the answer. 
Result so far: 3935.0
Subtracting 850 from 945 leaves us with 95.
Take the next digit (1) from the dividend and append it to 95, then repeat: 951 / 170

Let's proceed to step 7:
If we divide 951 by 170, we get 5 and a remainder of 101.
Use 5 as the next digit of our solution. 
Result so far: 39355.0
If we take 850 away from 951, we end up with 101.
Fetch the next digit (6) from the dividend, attach it to 101 and continue: 1016 / 170

Moving on to step 8:
1016 divided by 170 is 5 with a remainder of 166.
Record the quotient 5 as the next digit in the result. 
Result so far: 393555.0
If we take 850 away from 1016, we end up with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Step 9:
1660 divided by 170 is 9 with a remainder of 130.
Put 9 as the next digit of the answer. 
Result so far: 393555.9
If we take 1530 away from 1660, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 10:
When dividing 1300 by 170, we get 7 with a remainder of 110.
Record the quotient 7 as the next digit in the result. 
Result so far: 393555.97
Subtracting 1190 from 1300 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 11:
1100 divided by 170 is 6 with a remainder of 80.
The next digit of our result is 6. 
Result so far: 393555.976
The remainder is 80 after subtracting 1020 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 12:
When dividing 800 by 170, we get 4 with a remainder of 120.
Write down 4 as next digit of the result. 
Result so far: 393555.9764
The remainder is 120 after subtracting 680 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 13:
If we divide 1200 by 170, we get 7 and a remainder of 10.
The next digit of our result is 7. 
Result so far: 393555.97647
Subtracting 1190 from 1200 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
The number 170 fits into 100 0 times, leaving a remainder of 100.
The number 0 becomes the next digit in our result. 
Result so far: 393555.97647
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 15:
When dividing 1000 by 170, we get 5 with a remainder of 150.
Use 5 as the next digit of our solution. 
Result so far: 393555.9764705
The remainder is 150 after subtracting 850 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 16:
If we divide 1500 by 170, we get 8 and a remainder of 140.
Write down 8 as next digit of the result. 
Result so far: 393555.97647058
The remainder is 140 after subtracting 1360 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

In conclusion, the division gives 393555.97647058 with a balance of 1.4e-07.