We're dividing 81509389 by 141 
We want to divide 81509389 by 141.

Moving on to step 1:
The number 141 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 141

Moving on to step 2:
141 can be fit into 81 0 times, resulting in a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Take the next digit (5) from the dividend and append it to 81, then repeat: 815 / 141

Going ahead to step 3:
When dividing 815 by 141, we get 5 with a remainder of 110.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 705 away from 815, we end up with 110.
Take the next digit (0) from the dividend and append it to 110, then repeat: 1100 / 141

Moving on to step 4:
1100 divided by 141 is 7 with a remainder of 113.
Put 7 as the next digit of the answer. 
Result so far: 57.0
Subtract 987 from 1100 to get 113.
Take the next digit (9) from the dividend and append it to 113, then repeat: 1139 / 141

Going ahead to step 5:
1139 divided by 141 is 8 with a remainder of 11.
Write down 8 as next digit of the result. 
Result so far: 578.0
Subtract 1128 from 1139 to get 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 141

Let's proceed to step 6:
113 divided by 141 is 0 with a remainder of 113.
Put 0 as the next digit of the answer. 
Result so far: 5780.0
Subtract 0 from 113 to get 113.
Append the next digit (8) from the dividend to 113 and continue with: 1138 / 141

Advancing to step 7:
The number 141 fits into 1138 8 times, leaving a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 57808.0
Subtracting 1128 from 1138 leaves us with 10.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 141

Moving on to step 8:
If we divide 109 by 141, we get 0 and a remainder of 109.
Use 0 as the next digit of our solution. 
Result so far: 578080.0
Deduct 0 from 109 and we're left with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 9:
141 can be fit into 1090 7 times, resulting in a remainder of 103.
The next digit of our result is 7. 
Result so far: 578080.7
If we subtract 987 from 1090, we get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Moving on to step 10:
When dividing 1030 by 141, we get 7 with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 578080.77
If we subtract 987 from 1030, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final result is 578080.77 with a remainder of 0.043.