We divide 640738 by 4
We want to figure out the number of times 640738 can be divided by 4.

Let's proceed to step 1:
6 divided by 4 is 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 2 after subtracting 4 from 6.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 4

Step 2:
4 can be fit into 24 6 times, resulting in a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtracting 24 from 24 leaves us with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 4

Advancing to step 3:
When dividing 0 by 4, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 160.0
If we subtract 0 from 0, we get 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 4

Let's proceed to step 4:
7 divided by 4 is 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 1601.0
Subtract 4 from 7 to get 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 4

Going ahead to step 5:
If we divide 33 by 4, we get 8 and a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 16018.0
Deduct 32 from 33 and we're left with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 4

Going ahead to step 6:
4 goes into 18 4 times with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 160184.0
The remainder is 2 after subtracting 16 from 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
4 goes into 20 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 160184.5
Deduct 20 from 20 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
If we divide 0 by 4, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 160184.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
0 divided by 4 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 160184.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 160184.5, with a leftover of 0.0.