We divide 78799921 by 420
Our goal is to divide 78799921 by 420.

Going ahead to step 1:
The number 420 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 420

On to step 2:
78 divided by 420 is 0 with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Include the next digit (7) from the dividend after 78, then repeat: 787 / 420

Going ahead to step 3:
When dividing 787 by 420, we get 1 with a remainder of 367.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 420 from 787 and we're left with 367.
Append the next digit (9) from the dividend to 367 and continue with: 3679 / 420

Step 4:
420 can be fit into 3679 8 times, resulting in a remainder of 319.
The next digit of our result is 8. 
Result so far: 18.0
If we subtract 3360 from 3679, we get 319.
Append the next digit (9) from the dividend to 319 and continue with: 3199 / 420

Advancing to step 5:
The number 420 fits into 3199 7 times, leaving a remainder of 259.
Use 7 as the next digit of our solution. 
Result so far: 187.0
Subtracting 2940 from 3199 leaves us with 259.
Bring next digit (9) of the dividend behind the 259 and repeat the process: 2599 / 420

Let's proceed to step 6:
When dividing 2599 by 420, we get 6 with a remainder of 79.
The next digit of our result is 6. 
Result so far: 1876.0
Subtract 2520 from 2599 to get 79.
Grab the next digit (2) from the dividend, add it to 79, then carry on: 792 / 420

Step 7:
The number 420 fits into 792 1 times, leaving a remainder of 372.
Record the quotient 1 as the next digit in the result. 
Result so far: 18761.0
Deduct 420 from 792 and we're left with 372.
Take the next digit (1) from the dividend and append it to 372, then repeat: 3721 / 420

Advancing to step 8:
420 goes into 3721 8 times with a remainder of 361.
Put 8 as the next digit of the answer. 
Result so far: 187618.0
The remainder is 361 after subtracting 3360 from 3721.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

On to step 9:
420 can be fit into 3610 8 times, resulting in a remainder of 250.
The next digit of our result is 8. 
Result so far: 187618.8
Deduct 3360 from 3610 and we're left with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Advancing to step 10:
When dividing 2500 by 420, we get 5 with a remainder of 400.
Use 5 as the next digit of our solution. 
Result so far: 187618.85
If we take 2100 away from 2500, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Step 11:
420 goes into 4000 9 times with a remainder of 220.
Write down 9 as next digit of the result. 
Result so far: 187618.859
Subtracting 3780 from 4000 leaves us 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.

Going ahead to step 12:
When dividing 2200 by 420, we get 5 with a remainder of 100.
Record the quotient 5 as the next digit in the result. 
Result so far: 187618.8595
Subtract 2100 from 2200 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 13:
When dividing 1000 by 420, we get 2 with a remainder of 160.
Use 2 as the next digit of our solution. 
Result so far: 187618.85952
The remainder is 160 after subtracting 840 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 14:
420 goes into 1600 3 times with a remainder of 340.
Put 3 as the next digit of the answer. 
Result so far: 187618.859523
The remainder is 340 after subtracting 1260 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 15:
If we divide 3400 by 420, we get 8 and a remainder of 40.
The next digit of our result is 8. 
Result so far: 187618.8595238
Deduct 3360 from 3400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 16:
When dividing 400 by 420, we get 0 with a remainder of 400.
Write down 0 as next digit of the result. 
Result so far: 187618.8595238
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

In conclusion, the division gives 187618.8595238 with a balance of 4e-07.