We're dividing 86344355 by 789 
Let's see how many times 789 fits into 86344355.

Going ahead to step 1:
When dividing 8 by 789, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 789

Moving on to step 2:
The number 789 fits into 86 0 times, leaving a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Grab the next digit (3) from the dividend, add it to 86, then carry on: 863 / 789

On to step 3:
789 goes into 863 1 times with a remainder of 74.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 789 from 863 leaves us with 74.
Append the next digit (4) from the dividend to 74 and continue with: 744 / 789

Moving on to step 4:
789 can be fit into 744 0 times, resulting in a remainder of 744.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 744 to get 744.
Include the next digit (4) from the dividend after 744, then repeat: 7444 / 789

Step 5:
When dividing 7444 by 789, we get 9 with a remainder of 343.
The number 9 becomes the next digit in our result. 
Result so far: 109.0
The remainder is 343 after subtracting 7101 from 7444.
Include the next digit (3) from the dividend after 343, then repeat: 3433 / 789

Let's proceed to step 6:
3433 divided by 789 is 4 with a remainder of 277.
Record the quotient 4 as the next digit in the result. 
Result so far: 1094.0
Subtracting 3156 from 3433 leaves us with 277.
Append the next digit (5) from the dividend to 277 and continue with: 2775 / 789

Let's proceed to step 7:
The number 789 fits into 2775 3 times, leaving a remainder of 408.
The number 3 becomes the next digit in our result. 
Result so far: 10943.0
Subtract 2367 from 2775 to get 408.
Grab the next digit (5) from the dividend, add it to 408, then carry on: 4085 / 789

Going ahead to step 8:
789 goes into 4085 5 times with a remainder of 140.
Record the quotient 5 as the next digit in the result. 
Result so far: 109435.0
If we take 3945 away from 4085, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 9:
If we divide 1400 by 789, we get 1 and a remainder of 611.
Use 1 as the next digit of our solution. 
Result so far: 109435.1
If we take 789 away from 1400, we end up with 611.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6110, and continue the process.

Let's proceed to step 10:
789 can be fit into 6110 7 times, resulting in a remainder of 587.
Write down 7 as next digit of the result. 
Result so far: 109435.17
Subtract 5523 from 6110 to get 587.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5870, and continue the process.

Advancing to step 11:
When dividing 5870 by 789, we get 7 with a remainder of 347.
Write down 7 as next digit of the result. 
Result so far: 109435.177
If we take 5523 away from 5870, we end up with 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

The quotient of the division is 109435.177, and the remainder is 0.0347.