We're dividing 71387355 by 863 
We want to figure out the number of times 71387355 can be divided by 863.

Moving on to step 1:
863 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 863

Going ahead to step 2:
When dividing 71 by 863, we get 0 with a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Grab the next digit (3) from the dividend, add it to 71, then carry on: 713 / 863

Advancing to step 3:
When dividing 713 by 863, we get 0 with a remainder of 713.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 713 to get 713.
Bring next digit (8) of the dividend behind the 713 and repeat the process: 7138 / 863

Step 4:
When dividing 7138 by 863, we get 8 with a remainder of 234.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 234 after subtracting 6904 from 7138.
Fetch the next digit (7) from the dividend, attach it to 234 and continue: 2347 / 863

Let's proceed to step 5:
When dividing 2347 by 863, we get 2 with a remainder of 621.
Put 2 as the next digit of the answer. 
Result so far: 82.0
If we take 1726 away from 2347, we end up with 621.
Append the next digit (3) from the dividend to 621 and continue with: 6213 / 863

Moving on to step 6:
The number 863 fits into 6213 7 times, leaving a remainder of 172.
Write down 7 as next digit of the result. 
Result so far: 827.0
Subtracting 6041 from 6213 leaves us with 172.
Include the next digit (5) from the dividend after 172, then repeat: 1725 / 863

Going ahead to step 7:
863 can be fit into 1725 1 times, resulting in a remainder of 862.
Use 1 as the next digit of our solution. 
Result so far: 8271.0
Deduct 863 from 1725 and we're left with 862.
Include the next digit (5) from the dividend after 862, then repeat: 8625 / 863

Step 8:
The number 863 fits into 8625 9 times, leaving a remainder of 858.
Write down 9 as next digit of the result. 
Result so far: 82719.0
Subtracting 7767 from 8625 leaves us with 858.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8580, and continue the process.

Step 9:
If we divide 8580 by 863, we get 9 and a remainder of 813.
Put 9 as the next digit of the answer. 
Result so far: 82719.9
Subtract 7767 from 8580 to get 813.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8130, and continue the process.

Step 10:
If we divide 8130 by 863, we get 9 and a remainder of 363.
Use 9 as the next digit of our solution. 
Result so far: 82719.99
Deduct 7767 from 8130 and we're left with 363.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

After the division, we end up with 82719.99 and a remainder of 0.363.