71860163 ÷ 91 
We want to figure out the number of times 71860163 can be divided by 91.

Going ahead to step 1:
7 divided by 91 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 91

Moving on to step 2:
If we divide 71 by 91, we get 0 and a remainder of 71.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 71 and we're left with 71.
Append the next digit (8) from the dividend to 71 and continue with: 718 / 91

Going ahead to step 3:
91 goes into 718 7 times with a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 637 from 718, we get 81.
Fetch the next digit (6) from the dividend, attach it to 81 and continue: 816 / 91

Advancing to step 4:
If we divide 816 by 91, we get 8 and a remainder of 88.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
Subtract 728 from 816 to get 88.
Include the next digit (0) from the dividend after 88, then repeat: 880 / 91

On to step 5:
The number 91 fits into 880 9 times, leaving a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 789.0
Subtract 819 from 880 to get 61.
Fetch the next digit (1) from the dividend, attach it to 61 and continue: 611 / 91

Step 6:
611 divided by 91 is 6 with a remainder of 65.
The number 6 becomes the next digit in our result. 
Result so far: 7896.0
Deduct 546 from 611 and we're left with 65.
Include the next digit (6) from the dividend after 65, then repeat: 656 / 91

Moving on to step 7:
91 can be fit into 656 7 times, resulting in a remainder of 19.
The next digit of our result is 7. 
Result so far: 78967.0
Deduct 637 from 656 and we're left with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 91

Going ahead to step 8:
193 divided by 91 is 2 with a remainder of 11.
Write down 2 as next digit of the result. 
Result so far: 789672.0
If we take 182 away from 193, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 9:
91 can be fit into 110 1 times, resulting in a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 789672.1
If we subtract 91 from 110, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 10:
91 goes into 190 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 789672.12
If we take 182 away from 190, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 11:
When dividing 80 by 91, we get 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 789672.12
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 12:
91 goes into 800 8 times with a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 789672.1208
If we subtract 728 from 800, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 13:
91 can be fit into 720 7 times, resulting in a remainder of 83.
Use 7 as the next digit of our solution. 
Result so far: 789672.12087
If we subtract 637 from 720, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 14:
The number 91 fits into 830 9 times, leaving a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 789672.120879
Deduct 819 from 830 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 15:
91 can be fit into 110 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 789672.1208791
The remainder is 19 after subtracting 91 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 16:
190 divided by 91 is 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 789672.12087912
If we subtract 182 from 190, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 789672.12087912, and the remainder is 8e-09.