Let's divide 64393123 by 428
We're looking to find how many times 428 goes into 64393123.

Going ahead to step 1:
When dividing 6 by 428, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 428

Let's proceed to step 2:
When dividing 64 by 428, we get 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Bring next digit (3) of the dividend behind the 64 and repeat the process: 643 / 428

Let's proceed to step 3:
When dividing 643 by 428, we get 1 with a remainder of 215.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 428 from 643 to get 215.
Include the next digit (9) from the dividend after 215, then repeat: 2159 / 428

Let's proceed to step 4:
428 can be fit into 2159 5 times, resulting in a remainder of 19.
The next digit of our result is 5. 
Result so far: 15.0
If we take 2140 away from 2159, we end up with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 428

Advancing to step 5:
428 can be fit into 193 0 times, resulting in a remainder of 193.
Use 0 as the next digit of our solution. 
Result so far: 150.0
Subtract 0 from 193 to get 193.
Fetch the next digit (1) from the dividend, attach it to 193 and continue: 1931 / 428

Step 6:
1931 divided by 428 is 4 with a remainder of 219.
Record the quotient 4 as the next digit in the result. 
Result so far: 1504.0
Subtract 1712 from 1931 to get 219.
Grab the next digit (2) from the dividend, add it to 219, then carry on: 2192 / 428

On to step 7:
When dividing 2192 by 428, we get 5 with a remainder of 52.
Put 5 as the next digit of the answer. 
Result so far: 15045.0
Subtracting 2140 from 2192 leaves us with 52.
Include the next digit (3) from the dividend after 52, then repeat: 523 / 428

Advancing to step 8:
428 goes into 523 1 times with a remainder of 95.
The number 1 becomes the next digit in our result. 
Result so far: 150451.0
The remainder is 95 after subtracting 428 from 523.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Step 9:
If we divide 950 by 428, we get 2 and a remainder of 94.
Put 2 as the next digit of the answer. 
Result so far: 150451.2
If we take 856 away from 950, we end up with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Let's proceed to step 10:
If we divide 940 by 428, we get 2 and a remainder of 84.
The next digit of our result is 2. 
Result so far: 150451.22
Deduct 856 from 940 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The final outcome is 150451.22, with a leftover of 0.084.