78060842 ÷ 421 
We want to figure out the number of times 78060842 can be divided by 421.

Step 1:
421 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 421

Going ahead to step 2:
421 goes into 78 0 times with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Append the next digit (0) from the dividend to 78 and continue with: 780 / 421

Step 3:
The number 421 fits into 780 1 times, leaving a remainder of 359.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 359 after subtracting 421 from 780.
Take the next digit (6) from the dividend and append it to 359, then repeat: 3596 / 421

Let's proceed to step 4:
421 can be fit into 3596 8 times, resulting in a remainder of 228.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Deduct 3368 from 3596 and we're left with 228.
Take the next digit (0) from the dividend and append it to 228, then repeat: 2280 / 421

Step 5:
2280 divided by 421 is 5 with a remainder of 175.
Record the quotient 5 as the next digit in the result. 
Result so far: 185.0
The remainder is 175 after subtracting 2105 from 2280.
Fetch the next digit (8) from the dividend, attach it to 175 and continue: 1758 / 421

Let's proceed to step 6:
421 goes into 1758 4 times with a remainder of 74.
The next digit of our result is 4. 
Result so far: 1854.0
The remainder is 74 after subtracting 1684 from 1758.
Bring next digit (4) of the dividend behind the 74 and repeat the process: 744 / 421

Step 7:
421 goes into 744 1 times with a remainder of 323.
Put 1 as the next digit of the answer. 
Result so far: 18541.0
If we subtract 421 from 744, we get 323.
Append the next digit (2) from the dividend to 323 and continue with: 3232 / 421

Advancing to step 8:
The number 421 fits into 3232 7 times, leaving a remainder of 285.
Use 7 as the next digit of our solution. 
Result so far: 185417.0
Deduct 2947 from 3232 and we're left with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Going ahead to step 9:
421 goes into 2850 6 times with a remainder of 324.
Write down 6 as next digit of the result. 
Result so far: 185417.6
Subtract 2526 from 2850 to get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Going ahead to step 10:
421 goes into 3240 7 times with a remainder of 293.
Use 7 as the next digit of our solution. 
Result so far: 185417.67
If we subtract 2947 from 3240, we get 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Advancing to step 11:
The number 421 fits into 2930 6 times, leaving a remainder of 404.
The next digit of our result is 6. 
Result so far: 185417.676
The remainder is 404 after subtracting 2526 from 2930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 12:
4040 divided by 421 is 9 with a remainder of 251.
The next digit of our result is 9. 
Result so far: 185417.6769
The remainder is 251 after subtracting 3789 from 4040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Going ahead to step 13:
421 goes into 2510 5 times with a remainder of 405.
The next digit of our result is 5. 
Result so far: 185417.67695
The remainder is 405 after subtracting 2105 from 2510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Let's proceed to step 14:
421 goes into 4050 9 times with a remainder of 261.
Record the quotient 9 as the next digit in the result. 
Result so far: 185417.676959
If we take 3789 away from 4050, we end up with 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Let's proceed to step 15:
421 goes into 2610 6 times with a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 185417.6769596
Subtracting 2526 from 2610 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 16:
When dividing 840 by 421, we get 1 with a remainder of 419.
Record the quotient 1 as the next digit in the result. 
Result so far: 185417.67695961
Subtract 421 from 840 to get 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

The final outcome is 185417.67695961, with a leftover of 4.19e-07.