We divide 76421351 by 84
We want to figure out the number of times 76421351 can be divided by 84.

On to step 1:
7 divided by 84 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 84

Advancing to step 2:
84 goes into 76 0 times with a remainder of 76.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 76 to get 76.
Take the next digit (4) from the dividend and append it to 76, then repeat: 764 / 84

Going ahead to step 3:
The number 84 fits into 764 9 times, leaving a remainder of 8.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 756 from 764 leaves us with 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 84

Step 4:
84 can be fit into 82 0 times, resulting in a remainder of 82.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
Subtract 0 from 82 to get 82.
Fetch the next digit (1) from the dividend, attach it to 82 and continue: 821 / 84

Advancing to step 5:
821 divided by 84 is 9 with a remainder of 65.
Use 9 as the next digit of our solution. 
Result so far: 909.0
Deduct 756 from 821 and we're left with 65.
Bring next digit (3) of the dividend behind the 65 and repeat the process: 653 / 84

Step 6:
If we divide 653 by 84, we get 7 and a remainder of 65.
Write down 7 as next digit of the result. 
Result so far: 9097.0
Subtracting 588 from 653 leaves us with 65.
Fetch the next digit (5) from the dividend, attach it to 65 and continue: 655 / 84

Let's proceed to step 7:
84 goes into 655 7 times with a remainder of 67.
Put 7 as the next digit of the answer. 
Result so far: 90977.0
Deduct 588 from 655 and we're left with 67.
Take the next digit (1) from the dividend and append it to 67, then repeat: 671 / 84

Advancing to step 8:
The number 84 fits into 671 7 times, leaving a remainder of 83.
The next digit of our result is 7. 
Result so far: 909777.0
Subtracting 588 from 671 leaves us with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

On to step 9:
830 divided by 84 is 9 with a remainder of 74.
The number 9 becomes the next digit in our result. 
Result so far: 909777.9
Subtract 756 from 830 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 10:
The number 84 fits into 740 8 times, leaving a remainder of 68.
Put 8 as the next digit of the answer. 
Result so far: 909777.98
Subtracting 672 from 740 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 11:
If we divide 680 by 84, we get 8 and a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 909777.988
The remainder is 8 after subtracting 672 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 909777.988 with a remainder of 0.0008.