640359 ÷ 60 
We're looking to find how many times 60 goes into 640359.

Step 1:
60 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 60

On to step 2:
60 can be fit into 64 1 times, resulting in a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 60 from 64 and we're left with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 60

On to step 3:
60 can be fit into 40 0 times, resulting in a remainder of 40.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 40, we get 40.
Grab the next digit (3) from the dividend, add it to 40, then carry on: 403 / 60

On to step 4:
60 goes into 403 6 times with a remainder of 43.
The next digit of our result is 6. 
Result so far: 106.0
If we subtract 360 from 403, we get 43.
Include the next digit (5) from the dividend after 43, then repeat: 435 / 60

On to step 5:
60 goes into 435 7 times with a remainder of 15.
The number 7 becomes the next digit in our result. 
Result so far: 1067.0
Deduct 420 from 435 and we're left with 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 60

Advancing to step 6:
159 divided by 60 is 2 with a remainder of 39.
Record the quotient 2 as the next digit in the result. 
Result so far: 10672.0
Deduct 120 from 159 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 7:
When dividing 390 by 60, we get 6 with a remainder of 30.
The number 6 becomes the next digit in our result. 
Result so far: 10672.6
If we subtract 360 from 390, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
When dividing 300 by 60, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 10672.65
If we take 300 away from 300, we end up 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:
60 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10672.65
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.

Going ahead to step 10:
0 divided by 60 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10672.65
If we subtract 0 from 0, we get 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 result is 10672.65 with a remainder of 0.0.