We're dividing 81551721 by 654 
Our goal is to divide 81551721 by 654.

Step 1:
654 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 654

Going ahead to step 2:
81 divided by 654 is 0 with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Include the next digit (5) from the dividend after 81, then repeat: 815 / 654

Moving on to step 3:
The number 654 fits into 815 1 times, leaving a remainder of 161.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 654 from 815 to get 161.
Bring next digit (5) of the dividend behind the 161 and repeat the process: 1615 / 654

Advancing to step 4:
The number 654 fits into 1615 2 times, leaving a remainder of 307.
Write down 2 as next digit of the result. 
Result so far: 12.0
The remainder is 307 after subtracting 1308 from 1615.
Append the next digit (1) from the dividend to 307 and continue with: 3071 / 654

Going ahead to step 5:
When dividing 3071 by 654, we get 4 with a remainder of 455.
Put 4 as the next digit of the answer. 
Result so far: 124.0
Subtract 2616 from 3071 to get 455.
Take the next digit (7) from the dividend and append it to 455, then repeat: 4557 / 654

Step 6:
When dividing 4557 by 654, we get 6 with a remainder of 633.
Use 6 as the next digit of our solution. 
Result so far: 1246.0
If we subtract 3924 from 4557, we get 633.
Append the next digit (2) from the dividend to 633 and continue with: 6332 / 654

On to step 7:
654 goes into 6332 9 times with a remainder of 446.
Use 9 as the next digit of our solution. 
Result so far: 12469.0
Subtract 5886 from 6332 to get 446.
Include the next digit (1) from the dividend after 446, then repeat: 4461 / 654

Going ahead to step 8:
When dividing 4461 by 654, we get 6 with a remainder of 537.
Record the quotient 6 as the next digit in the result. 
Result so far: 124696.0
Subtract 3924 from 4461 to get 537.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5370, and continue the process.

Step 9:
654 goes into 5370 8 times with a remainder of 138.
Put 8 as the next digit of the answer. 
Result so far: 124696.8
Subtract 5232 from 5370 to get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Going ahead to step 10:
The number 654 fits into 1380 2 times, leaving a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 124696.82
The remainder is 72 after subtracting 1308 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 11:
720 divided by 654 is 1 with a remainder of 66.
The next digit of our result is 1. 
Result so far: 124696.821
If we take 654 away from 720, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 12:
If we divide 660 by 654, we get 1 and a remainder of 6.
The next digit of our result is 1. 
Result so far: 124696.8211
Subtract 654 from 660 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 124696.8211, with a leftover of 6e-05.