We're dividing 51311559 by 69 
We want to divide 51311559 by 69.

Step 1:
The number 69 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 69

Moving on to step 2:
69 can be fit into 51 0 times, resulting in a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 69

On to step 3:
69 goes into 513 7 times with a remainder of 30.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 483 from 513 to get 30.
Take the next digit (1) from the dividend and append it to 30, then repeat: 301 / 69

Moving on to step 4:
69 goes into 301 4 times with a remainder of 25.
The number 4 becomes the next digit in our result. 
Result so far: 74.0
If we take 276 away from 301, we end up with 25.
Bring next digit (1) of the dividend behind the 25 and repeat the process: 251 / 69

Advancing to step 5:
251 divided by 69 is 3 with a remainder of 44.
Use 3 as the next digit of our solution. 
Result so far: 743.0
Deduct 207 from 251 and we're left with 44.
Grab the next digit (5) from the dividend, add it to 44, then carry on: 445 / 69

Advancing to step 6:
If we divide 445 by 69, we get 6 and a remainder of 31.
The number 6 becomes the next digit in our result. 
Result so far: 7436.0
Subtracting 414 from 445 leaves us with 31.
Fetch the next digit (5) from the dividend, attach it to 31 and continue: 315 / 69

Let's proceed to step 7:
If we divide 315 by 69, we get 4 and a remainder of 39.
Put 4 as the next digit of the answer. 
Result so far: 74364.0
If we take 276 away from 315, we end up with 39.
Bring next digit (9) of the dividend behind the 39 and repeat the process: 399 / 69

Step 8:
The number 69 fits into 399 5 times, leaving a remainder of 54.
The number 5 becomes the next digit in our result. 
Result so far: 743645.0
If we subtract 345 from 399, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 9:
The number 69 fits into 540 7 times, leaving a remainder of 57.
The number 7 becomes the next digit in our result. 
Result so far: 743645.7
If we subtract 483 from 540, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 10:
570 divided by 69 is 8 with a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 743645.78
The remainder is 18 after subtracting 552 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 11:
When dividing 180 by 69, we get 2 with a remainder of 42.
Put 2 as the next digit of the answer. 
Result so far: 743645.782
Subtract 138 from 180 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 12:
420 divided by 69 is 6 with a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 743645.7826
Deduct 414 from 420 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 13:
60 divided by 69 is 0 with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 743645.7826
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 14:
69 can be fit into 600 8 times, resulting in a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 743645.782608
Deduct 552 from 600 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 15:
69 goes into 480 6 times with a remainder of 66.
The number 6 becomes the next digit in our result. 
Result so far: 743645.7826086
Subtracting 414 from 480 leaves us 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.

On to step 16:
When dividing 660 by 69, we get 9 with a remainder of 39.
Record the quotient 9 as the next digit in the result. 
Result so far: 743645.78260869
Subtracting 621 from 660 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The quotient of the division is 743645.78260869, and the remainder is 3.9e-08.