68150020 ÷ 159 
We want to divide 68150020 by 159.

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.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 159

Step 2:
The number 159 fits into 68 0 times, leaving a remainder of 68.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 68, we get 68.
Include the next digit (1) from the dividend after 68, then repeat: 681 / 159

Advancing to step 3:
When dividing 681 by 159, we get 4 with a remainder of 45.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 636 from 681 leaves us with 45.
Bring next digit (5) of the dividend behind the 45 and repeat the process: 455 / 159

Advancing to step 4:
The number 159 fits into 455 2 times, leaving a remainder of 137.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
Deduct 318 from 455 and we're left with 137.
Grab the next digit (0) from the dividend, add it to 137, then carry on: 1370 / 159

Moving on to step 5:
If we divide 1370 by 159, we get 8 and a remainder of 98.
The number 8 becomes the next digit in our result. 
Result so far: 428.0
Subtract 1272 from 1370 to get 98.
Fetch the next digit (0) from the dividend, attach it to 98 and continue: 980 / 159

Going ahead to step 6:
159 can be fit into 980 6 times, resulting in a remainder of 26.
The next digit of our result is 6. 
Result so far: 4286.0
If we take 954 away from 980, we end up with 26.
Bring next digit (2) of the dividend behind the 26 and repeat the process: 262 / 159

Going ahead to step 7:
159 goes into 262 1 times with a remainder of 103.
Put 1 as the next digit of the answer. 
Result so far: 42861.0
If we subtract 159 from 262, we get 103.
Grab the next digit (0) from the dividend, add it to 103, then carry on: 1030 / 159

On to step 8:
1030 divided by 159 is 6 with a remainder of 76.
Put 6 as the next digit of the answer. 
Result so far: 428616.0
Subtract 954 from 1030 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 9:
If we divide 760 by 159, we get 4 and a remainder of 124.
The number 4 becomes the next digit in our result. 
Result so far: 428616.4
Subtract 636 from 760 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Advancing to step 10:
The number 159 fits into 1240 7 times, leaving a remainder of 127.
Write down 7 as next digit of the result. 
Result so far: 428616.47
The remainder is 127 after subtracting 1113 from 1240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Moving on to step 11:
The number 159 fits into 1270 7 times, leaving a remainder of 157.
The number 7 becomes the next digit in our result. 
Result so far: 428616.477
If we subtract 1113 from 1270, we get 157.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

After the division, we end up with 428616.477 and a remainder of 0.0157.