66789421 ÷ 308 
We're looking to find how many times 308 goes into 66789421.

Step 1:
If we divide 6 by 308, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 308

On to step 2:
66 divided by 308 is 0 with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Grab the next digit (7) from the dividend, add it to 66, then carry on: 667 / 308

Step 3:
308 goes into 667 2 times with a remainder of 51.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 51 after subtracting 616 from 667.
Fetch the next digit (8) from the dividend, attach it to 51 and continue: 518 / 308

Moving on to step 4:
The number 308 fits into 518 1 times, leaving a remainder of 210.
Write down 1 as next digit of the result. 
Result so far: 21.0
If we subtract 308 from 518, we get 210.
Bring next digit (9) of the dividend behind the 210 and repeat the process: 2109 / 308

Let's proceed to step 5:
308 can be fit into 2109 6 times, resulting in a remainder of 261.
Use 6 as the next digit of our solution. 
Result so far: 216.0
Deduct 1848 from 2109 and we're left with 261.
Fetch the next digit (4) from the dividend, attach it to 261 and continue: 2614 / 308

Let's proceed to step 6:
308 goes into 2614 8 times with a remainder of 150.
The next digit of our result is 8. 
Result so far: 2168.0
The remainder is 150 after subtracting 2464 from 2614.
Take the next digit (2) from the dividend and append it to 150, then repeat: 1502 / 308

On to step 7:
1502 divided by 308 is 4 with a remainder of 270.
Record the quotient 4 as the next digit in the result. 
Result so far: 21684.0
The remainder is 270 after subtracting 1232 from 1502.
Take the next digit (1) from the dividend and append it to 270, then repeat: 2701 / 308

Let's proceed to step 8:
When dividing 2701 by 308, we get 8 with a remainder of 237.
The number 8 becomes the next digit in our result. 
Result so far: 216848.0
Subtract 2464 from 2701 to get 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Let's proceed to step 9:
308 can be fit into 2370 7 times, resulting in a remainder of 214.
The next digit of our result is 7. 
Result so far: 216848.7
The remainder is 214 after subtracting 2156 from 2370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Moving on to step 10:
If we divide 2140 by 308, we get 6 and a remainder of 292.
Use 6 as the next digit of our solution. 
Result so far: 216848.76
Subtracting 1848 from 2140 leaves us with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Advancing to step 11:
When dividing 2920 by 308, we get 9 with a remainder of 148.
The next digit of our result is 9. 
Result so far: 216848.769
If we subtract 2772 from 2920, we get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Going ahead to step 12:
1480 divided by 308 is 4 with a remainder of 248.
The number 4 becomes the next digit in our result. 
Result so far: 216848.7694
Subtracting 1232 from 1480 leaves us with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Going ahead to step 13:
308 can be fit into 2480 8 times, resulting in a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 216848.76948
If we subtract 2464 from 2480, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
When dividing 160 by 308, we get 0 with a remainder of 160.
Write down 0 as next digit of the result. 
Result so far: 216848.76948
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 15:
If we divide 1600 by 308, we get 5 and a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 216848.7694805
Subtracting 1540 from 1600 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 16:
When dividing 600 by 308, we get 1 with a remainder of 292.
The next digit of our result is 1. 
Result so far: 216848.76948051
Subtract 308 from 600 to get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Our division results in 216848.76948051 with a remaining 2.92e-07.