64651993 ÷ 306 
We want to figure out the number of times 64651993 can be divided by 306.

Advancing to step 1:
If we divide 6 by 306, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 306

Advancing to step 2:
64 divided by 306 is 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Fetch the next digit (6) from the dividend, attach it to 64 and continue: 646 / 306

Let's proceed to step 3:
The number 306 fits into 646 2 times, leaving a remainder of 34.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 612 away from 646, we end up with 34.
Take the next digit (5) from the dividend and append it to 34, then repeat: 345 / 306

Going ahead to step 4:
306 goes into 345 1 times with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 21.0
If we subtract 306 from 345, we get 39.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 306

Moving on to step 5:
If we divide 391 by 306, we get 1 and a remainder of 85.
The number 1 becomes the next digit in our result. 
Result so far: 211.0
Deduct 306 from 391 and we're left with 85.
Grab the next digit (9) from the dividend, add it to 85, then carry on: 859 / 306

Let's proceed to step 6:
When dividing 859 by 306, we get 2 with a remainder of 247.
Put 2 as the next digit of the answer. 
Result so far: 2112.0
Deduct 612 from 859 and we're left with 247.
Grab the next digit (9) from the dividend, add it to 247, then carry on: 2479 / 306

Going ahead to step 7:
2479 divided by 306 is 8 with a remainder of 31.
Use 8 as the next digit of our solution. 
Result so far: 21128.0
The remainder is 31 after subtracting 2448 from 2479.
Grab the next digit (3) from the dividend, add it to 31, then carry on: 313 / 306

Moving on to step 8:
306 goes into 313 1 times with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 211281.0
Subtract 306 from 313 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 9:
If we divide 70 by 306, we get 0 and a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 211281.0
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 10:
If we divide 700 by 306, we get 2 and a remainder of 88.
Use 2 as the next digit of our solution. 
Result so far: 211281.02
The remainder is 88 after subtracting 612 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 11:
When dividing 880 by 306, we get 2 with a remainder of 268.
Record the quotient 2 as the next digit in the result. 
Result so far: 211281.022
The remainder is 268 after subtracting 612 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

The quotient of the division is 211281.022, and the remainder is 0.0268.