Let's divide 66986814 by 159
We want to divide 66986814 by 159.

On to step 1:
6 divided by 159 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 159

Advancing to step 2:
The number 159 fits into 66 0 times, leaving a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 159

Going ahead to step 3:
If we divide 669 by 159, we get 4 and a remainder of 33.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 636 from 669 leaves us with 33.
Take the next digit (8) from the dividend and append it to 33, then repeat: 338 / 159

Moving on to step 4:
159 goes into 338 2 times with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 42.0
The remainder is 20 after subtracting 318 from 338.
Include the next digit (6) from the dividend after 20, then repeat: 206 / 159

On to step 5:
When dividing 206 by 159, we get 1 with a remainder of 47.
Use 1 as the next digit of our solution. 
Result so far: 421.0
Subtract 159 from 206 to get 47.
Fetch the next digit (8) from the dividend, attach it to 47 and continue: 478 / 159

Step 6:
The number 159 fits into 478 3 times, leaving a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 4213.0
Deduct 477 from 478 and we're left with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 159

Moving on to step 7:
If we divide 11 by 159, we get 0 and a remainder of 11.
The next digit of our result is 0. 
Result so far: 42130.0
If we subtract 0 from 11, we get 11.
Include the next digit (4) from the dividend after 11, then repeat: 114 / 159

Advancing to step 8:
When dividing 114 by 159, we get 0 with a remainder of 114.
The next digit of our result is 0. 
Result so far: 421300.0
If we take 0 away from 114, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Step 9:
If we divide 1140 by 159, we get 7 and a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 421300.7
Subtract 1113 from 1140 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 10:
159 can be fit into 270 1 times, resulting in a remainder of 111.
Write down 1 as next digit of the result. 
Result so far: 421300.71
The remainder is 111 after subtracting 159 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Going ahead to step 11:
159 goes into 1110 6 times with a remainder of 156.
Write down 6 as next digit of the result. 
Result so far: 421300.716
Subtract 954 from 1110 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Step 12:
159 can be fit into 1560 9 times, resulting in a remainder of 129.
Use 9 as the next digit of our solution. 
Result so far: 421300.7169
Subtract 1431 from 1560 to get 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Going ahead to step 13:
1290 divided by 159 is 8 with a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 421300.71698
Subtracting 1272 from 1290 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 14:
When dividing 180 by 159, we get 1 with a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 421300.716981
The remainder is 21 after subtracting 159 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 15:
The number 159 fits into 210 1 times, leaving a remainder of 51.
Put 1 as the next digit of the answer. 
Result so far: 421300.7169811
If we subtract 159 from 210, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

The final result is 421300.7169811 with a remainder of 5.1e-07.