We look at the division of 77421065 by 216 
Let's see how many times 216 fits into 77421065.

On to step 1:
7 divided by 216 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 216

Advancing to step 2:
216 can be fit into 77 0 times, resulting in a remainder of 77.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Include the next digit (4) from the dividend after 77, then repeat: 774 / 216

Advancing to step 3:
216 can be fit into 774 3 times, resulting in a remainder of 126.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 648 from 774 leaves us with 126.
Fetch the next digit (2) from the dividend, attach it to 126 and continue: 1262 / 216

Let's proceed to step 4:
216 goes into 1262 5 times with a remainder of 182.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
The remainder is 182 after subtracting 1080 from 1262.
Include the next digit (1) from the dividend after 182, then repeat: 1821 / 216

On to step 5:
When dividing 1821 by 216, we get 8 with a remainder of 93.
Use 8 as the next digit of our solution. 
Result so far: 358.0
Subtract 1728 from 1821 to get 93.
Include the next digit (0) from the dividend after 93, then repeat: 930 / 216

Going ahead to step 6:
When dividing 930 by 216, we get 4 with a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 3584.0
Subtracting 864 from 930 leaves us with 66.
Append the next digit (6) from the dividend to 66 and continue with: 666 / 216

On to step 7:
The number 216 fits into 666 3 times, leaving a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 35843.0
If we take 648 away from 666, we end up with 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 216

Let's proceed to step 8:
185 divided by 216 is 0 with a remainder of 185.
Record the quotient 0 as the next digit in the result. 
Result so far: 358430.0
Subtract 0 from 185 to get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

On to step 9:
When dividing 1850 by 216, we get 8 with a remainder of 122.
The number 8 becomes the next digit in our result. 
Result so far: 358430.8
Deduct 1728 from 1850 and we're left with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Let's proceed to step 10:
The number 216 fits into 1220 5 times, leaving a remainder of 140.
The number 5 becomes the next digit in our result. 
Result so far: 358430.85
If we subtract 1080 from 1220, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 11:
The number 216 fits into 1400 6 times, leaving a remainder of 104.
Put 6 as the next digit of the answer. 
Result so far: 358430.856
Subtracting 1296 from 1400 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.

Step 12:
The number 216 fits into 1040 4 times, leaving a remainder of 176.
Use 4 as the next digit of our solution. 
Result so far: 358430.8564
If we take 864 away from 1040, we end up with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Going ahead to step 13:
When dividing 1760 by 216, we get 8 with a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 358430.85648
The remainder is 32 after subtracting 1728 from 1760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 14:
320 divided by 216 is 1 with a remainder of 104.
The next digit of our result is 1. 
Result so far: 358430.856481
If we subtract 216 from 320, we get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Advancing to step 15:
When dividing 1040 by 216, we get 4 with a remainder of 176.
The next digit of our result is 4. 
Result so far: 358430.8564814
The remainder is 176 after subtracting 864 from 1040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

On to step 16:
216 goes into 1760 8 times with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 358430.85648148
Subtracting 1728 from 1760 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final result is 358430.85648148 with a remainder of 3.2e-08.