86428458 ÷ 773 
We want to figure out the number of times 86428458 can be divided by 773.

Moving on to step 1:
8 divided by 773 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 773

On to step 2:
When dividing 86 by 773, we get 0 with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Include the next digit (4) from the dividend after 86, then repeat: 864 / 773

Let's proceed to step 3:
If we divide 864 by 773, we get 1 and a remainder of 91.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 773 from 864 leaves us with 91.
Take the next digit (2) from the dividend and append it to 91, then repeat: 912 / 773

Going ahead to step 4:
912 divided by 773 is 1 with a remainder of 139.
Put 1 as the next digit of the answer. 
Result so far: 11.0
The remainder is 139 after subtracting 773 from 912.
Take the next digit (8) from the dividend and append it to 139, then repeat: 1398 / 773

Step 5:
1398 divided by 773 is 1 with a remainder of 625.
Record the quotient 1 as the next digit in the result. 
Result so far: 111.0
Deduct 773 from 1398 and we're left with 625.
Append the next digit (4) from the dividend to 625 and continue with: 6254 / 773

Advancing to step 6:
773 goes into 6254 8 times with a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 1118.0
Subtracting 6184 from 6254 leaves us with 70.
Fetch the next digit (5) from the dividend, attach it to 70 and continue: 705 / 773

Moving on to step 7:
If we divide 705 by 773, we get 0 and a remainder of 705.
Write down 0 as next digit of the result. 
Result so far: 11180.0
If we subtract 0 from 705, we get 705.
Fetch the next digit (8) from the dividend, attach it to 705 and continue: 7058 / 773

Let's proceed to step 8:
The number 773 fits into 7058 9 times, leaving a remainder of 101.
Write down 9 as next digit of the result. 
Result so far: 111809.0
Subtract 6957 from 7058 to get 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

On to step 9:
773 can be fit into 1010 1 times, resulting in a remainder of 237.
Use 1 as the next digit of our solution. 
Result so far: 111809.1
Subtract 773 from 1010 to get 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Step 10:
If we divide 2370 by 773, we get 3 and a remainder of 51.
The next digit of our result is 3. 
Result so far: 111809.13
Subtract 2319 from 2370 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 11:
773 goes into 510 0 times with a remainder of 510.
The next digit of our result is 0. 
Result so far: 111809.13
If we take 0 away from 510, we end up with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Moving on to step 12:
When dividing 5100 by 773, we get 6 with a remainder of 462.
The next digit of our result is 6. 
Result so far: 111809.1306
The remainder is 462 after subtracting 4638 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Step 13:
773 goes into 4620 5 times with a remainder of 755.
The number 5 becomes the next digit in our result. 
Result so far: 111809.13065
Deduct 3865 from 4620 and we're left with 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7550, and continue the process.

Advancing to step 14:
If we divide 7550 by 773, we get 9 and a remainder of 593.
Use 9 as the next digit of our solution. 
Result so far: 111809.130659
Deduct 6957 from 7550 and we're left with 593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5930, and continue the process.

Step 15:
5930 divided by 773 is 7 with a remainder of 519.
The number 7 becomes the next digit in our result. 
Result so far: 111809.1306597
If we subtract 5411 from 5930, we get 519.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5190, and continue the process.

Moving on to step 16:
When dividing 5190 by 773, we get 6 with a remainder of 552.
The next digit of our result is 6. 
Result so far: 111809.13065976
Subtract 4638 from 5190 to get 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

The final outcome is 111809.13065976, with a leftover of 5.52e-07.