We're dividing 81903530 by 51 
We're looking to find how many times 51 goes into 81903530.

On to step 1:
The number 51 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
The remainder is 8 after subtracting 0 from 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 51

Advancing to step 2:
51 goes into 81 1 times with a remainder of 30.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 51 from 81 leaves us with 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 51

Advancing to step 3:
The number 51 fits into 309 6 times, leaving a remainder of 3.
The next digit of our result is 6. 
Result so far: 16.0
Deduct 306 from 309 and we're left with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 51

Moving on to step 4:
51 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 160.0
If we take 0 away from 30, we end up with 30.
Fetch the next digit (3) from the dividend, attach it to 30 and continue: 303 / 51

Going ahead to step 5:
When dividing 303 by 51, we get 5 with a remainder of 48.
Write down 5 as next digit of the result. 
Result so far: 1605.0
Subtracting 255 from 303 leaves us with 48.
Grab the next digit (5) from the dividend, add it to 48, then carry on: 485 / 51

Step 6:
51 goes into 485 9 times with a remainder of 26.
The next digit of our result is 9. 
Result so far: 16059.0
Deduct 459 from 485 and we're left with 26.
Grab the next digit (3) from the dividend, add it to 26, then carry on: 263 / 51

Moving on to step 7:
263 divided by 51 is 5 with a remainder of 8.
Use 5 as the next digit of our solution. 
Result so far: 160595.0
Subtracting 255 from 263 leaves us with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 51

Advancing to step 8:
The number 51 fits into 80 1 times, leaving a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 1605951.0
If we take 51 away from 80, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 9:
51 goes into 290 5 times with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 1605951.5
If we take 255 away from 290, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 10:
When dividing 350 by 51, we get 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 1605951.56
If we subtract 306 from 350, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 11:
When dividing 440 by 51, we get 8 with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 1605951.568
Deduct 408 from 440 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 12:
The number 51 fits into 320 6 times, leaving a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 1605951.5686
If we take 306 away from 320, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 13:
140 divided by 51 is 2 with a remainder of 38.
Write down 2 as next digit of the result. 
Result so far: 1605951.56862
If we subtract 102 from 140, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 14:
If we divide 380 by 51, we get 7 and a remainder of 23.
The next digit of our result is 7. 
Result so far: 1605951.568627
If we take 357 away from 380, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 15:
When dividing 230 by 51, we get 4 with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 1605951.5686274
Deduct 204 from 230 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 16:
When dividing 260 by 51, we get 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 1605951.56862745
If we take 255 away from 260, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 1605951.56862745 with a remaining 5e-09.