51131811 ÷ 435 
Our goal is to divide 51131811 by 435.

Step 1:
435 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 435

Going ahead to step 2:
The number 435 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Grab the next digit (1) from the dividend, add it to 51, then carry on: 511 / 435

Moving on to step 3:
The number 435 fits into 511 1 times, leaving a remainder of 76.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 435 from 511 leaves us with 76.
Append the next digit (3) from the dividend to 76 and continue with: 763 / 435

On to step 4:
763 divided by 435 is 1 with a remainder of 328.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 435 from 763 leaves us with 328.
Fetch the next digit (1) from the dividend, attach it to 328 and continue: 3281 / 435

On to step 5:
If we divide 3281 by 435, we get 7 and a remainder of 236.
Put 7 as the next digit of the answer. 
Result so far: 117.0
If we subtract 3045 from 3281, we get 236.
Grab the next digit (8) from the dividend, add it to 236, then carry on: 2368 / 435

Let's proceed to step 6:
The number 435 fits into 2368 5 times, leaving a remainder of 193.
Write down 5 as next digit of the result. 
Result so far: 1175.0
Deduct 2175 from 2368 and we're left with 193.
Take the next digit (1) from the dividend and append it to 193, then repeat: 1931 / 435

On to step 7:
1931 divided by 435 is 4 with a remainder of 191.
Record the quotient 4 as the next digit in the result. 
Result so far: 11754.0
If we take 1740 away from 1931, we end up with 191.
Fetch the next digit (1) from the dividend, attach it to 191 and continue: 1911 / 435

Going ahead to step 8:
435 can be fit into 1911 4 times, resulting in a remainder of 171.
Write down 4 as next digit of the result. 
Result so far: 117544.0
Subtract 1740 from 1911 to get 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Let's proceed to step 9:
435 goes into 1710 3 times with a remainder of 405.
Record the quotient 3 as the next digit in the result. 
Result so far: 117544.3
If we subtract 1305 from 1710, we get 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Moving on to step 10:
When dividing 4050 by 435, we get 9 with a remainder of 135.
Put 9 as the next digit of the answer. 
Result so far: 117544.39
The remainder is 135 after subtracting 3915 from 4050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Going ahead to step 11:
The number 435 fits into 1350 3 times, leaving a remainder of 45.
Put 3 as the next digit of the answer. 
Result so far: 117544.393
If we take 1305 away from 1350, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 12:
435 can be fit into 450 1 times, resulting in a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 117544.3931
Subtract 435 from 450 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 13:
If we divide 150 by 435, we get 0 and a remainder of 150.
Write down 0 as next digit of the result. 
Result so far: 117544.3931
Subtracting 0 from 150 leaves us with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 14:
435 goes into 1500 3 times with a remainder of 195.
Write down 3 as next digit of the result. 
Result so far: 117544.393103
Subtracting 1305 from 1500 leaves us with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Step 15:
The number 435 fits into 1950 4 times, leaving a remainder of 210.
Write down 4 as next digit of the result. 
Result so far: 117544.3931034
If we subtract 1740 from 1950, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 16:
If we divide 2100 by 435, we get 4 and a remainder of 360.
Use 4 as the next digit of our solution. 
Result so far: 117544.39310344
Subtracting 1740 from 2100 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

After the division, we end up with 117544.39310344 and a remainder of 3.6e-07.