We're dividing 51260158 by 781 
We want to figure out the number of times 51260158 can be divided by 781.

On to step 1:
781 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 781

Advancing to step 2:
When dividing 51 by 781, we get 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Fetch the next digit (2) from the dividend, attach it to 51 and continue: 512 / 781

Let's proceed to step 3:
If we divide 512 by 781, we get 0 and a remainder of 512.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 512 leaves us with 512.
Include the next digit (6) from the dividend after 512, then repeat: 5126 / 781

Going ahead to step 4:
When dividing 5126 by 781, we get 6 with a remainder of 440.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 4686 away from 5126, we end up with 440.
Fetch the next digit (0) from the dividend, attach it to 440 and continue: 4400 / 781

Going ahead to step 5:
781 goes into 4400 5 times with a remainder of 495.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
Subtract 3905 from 4400 to get 495.
Bring next digit (1) of the dividend behind the 495 and repeat the process: 4951 / 781

Moving on to step 6:
781 can be fit into 4951 6 times, resulting in a remainder of 265.
Put 6 as the next digit of the answer. 
Result so far: 656.0
If we subtract 4686 from 4951, we get 265.
Grab the next digit (5) from the dividend, add it to 265, then carry on: 2655 / 781

Advancing to step 7:
If we divide 2655 by 781, we get 3 and a remainder of 312.
Write down 3 as next digit of the result. 
Result so far: 6563.0
Deduct 2343 from 2655 and we're left with 312.
Fetch the next digit (8) from the dividend, attach it to 312 and continue: 3128 / 781

Advancing to step 8:
781 goes into 3128 4 times with a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 65634.0
If we take 3124 away from 3128, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
781 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 65634.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
When dividing 400 by 781, we get 0 with a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 65634.0
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Our division results in 65634.0 with a remaining 0.4.