65401599 ÷ 538 
Let's see how many times 538 fits into 65401599.

On to step 1:
6 divided by 538 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 538

Advancing to step 2:
If we divide 65 by 538, we get 0 and a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 65, we get 65.
Grab the next digit (4) from the dividend, add it to 65, then carry on: 654 / 538

Moving on to step 3:
538 can be fit into 654 1 times, resulting in a remainder of 116.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 116 after subtracting 538 from 654.
Include the next digit (0) from the dividend after 116, then repeat: 1160 / 538

Moving on to step 4:
538 goes into 1160 2 times with a remainder of 84.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtract 1076 from 1160 to get 84.
Append the next digit (1) from the dividend to 84 and continue with: 841 / 538

Going ahead to step 5:
538 can be fit into 841 1 times, resulting in a remainder of 303.
The next digit of our result is 1. 
Result so far: 121.0
Deduct 538 from 841 and we're left with 303.
Fetch the next digit (5) from the dividend, attach it to 303 and continue: 3035 / 538

Step 6:
538 can be fit into 3035 5 times, resulting in a remainder of 345.
The next digit of our result is 5. 
Result so far: 1215.0
If we subtract 2690 from 3035, we get 345.
Include the next digit (9) from the dividend after 345, then repeat: 3459 / 538

Moving on to step 7:
When dividing 3459 by 538, we get 6 with a remainder of 231.
Use 6 as the next digit of our solution. 
Result so far: 12156.0
The remainder is 231 after subtracting 3228 from 3459.
Grab the next digit (9) from the dividend, add it to 231, then carry on: 2319 / 538

On to step 8:
If we divide 2319 by 538, we get 4 and a remainder of 167.
The number 4 becomes the next digit in our result. 
Result so far: 121564.0
Subtract 2152 from 2319 to get 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Going ahead to step 9:
538 goes into 1670 3 times with a remainder of 56.
Record the quotient 3 as the next digit in the result. 
Result so far: 121564.3
The remainder is 56 after subtracting 1614 from 1670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 10:
560 divided by 538 is 1 with a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 121564.31
Subtracting 538 from 560 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 11:
The number 538 fits into 220 0 times, leaving a remainder of 220.
Record the quotient 0 as the next digit in the result. 
Result so far: 121564.31
Deduct 0 from 220 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 12:
2200 divided by 538 is 4 with a remainder of 48.
The next digit of our result is 4. 
Result so far: 121564.3104
If we subtract 2152 from 2200, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 13:
The number 538 fits into 480 0 times, leaving a remainder of 480.
Write down 0 as next digit of the result. 
Result so far: 121564.3104
If we subtract 0 from 480, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 14:
538 can be fit into 4800 8 times, resulting in a remainder of 496.
Put 8 as the next digit of the answer. 
Result so far: 121564.310408
If we take 4304 away from 4800, we end up with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

On to step 15:
538 can be fit into 4960 9 times, resulting in a remainder of 118.
Use 9 as the next digit of our solution. 
Result so far: 121564.3104089
If we subtract 4842 from 4960, we get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Going ahead to step 16:
1180 divided by 538 is 2 with a remainder of 104.
The next digit of our result is 2. 
Result so far: 121564.31040892
Subtracting 1076 from 1180 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Our division results in 121564.31040892 with a remaining 1.04e-07.