80142506 ÷ 421 
Let's see how many times 421 fits into 80142506.

Going ahead to step 1:
If we divide 8 by 421, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 421

On to step 2:
If we divide 80 by 421, we get 0 and a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 80 after subtracting 0 from 80.
Include the next digit (1) from the dividend after 80, then repeat: 801 / 421

Going ahead to step 3:
801 divided by 421 is 1 with a remainder of 380.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 421 from 801 and we're left with 380.
Fetch the next digit (4) from the dividend, attach it to 380 and continue: 3804 / 421

Going ahead to step 4:
421 goes into 3804 9 times with a remainder of 15.
Put 9 as the next digit of the answer. 
Result so far: 19.0
If we subtract 3789 from 3804, we get 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 421

Let's proceed to step 5:
421 can be fit into 152 0 times, resulting in a remainder of 152.
Write down 0 as next digit of the result. 
Result so far: 190.0
Subtracting 0 from 152 leaves us with 152.
Fetch the next digit (5) from the dividend, attach it to 152 and continue: 1525 / 421

Going ahead to step 6:
The number 421 fits into 1525 3 times, leaving a remainder of 262.
Put 3 as the next digit of the answer. 
Result so far: 1903.0
The remainder is 262 after subtracting 1263 from 1525.
Append the next digit (0) from the dividend to 262 and continue with: 2620 / 421

Let's proceed to step 7:
421 can be fit into 2620 6 times, resulting in a remainder of 94.
The next digit of our result is 6. 
Result so far: 19036.0
If we subtract 2526 from 2620, we get 94.
Bring next digit (6) of the dividend behind the 94 and repeat the process: 946 / 421

Step 8:
946 divided by 421 is 2 with a remainder of 104.
The next digit of our result is 2. 
Result so far: 190362.0
If we take 842 away from 946, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 9:
1040 divided by 421 is 2 with a remainder of 198.
Use 2 as the next digit of our solution. 
Result so far: 190362.2
Deduct 842 from 1040 and we're left with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Let's proceed to step 10:
When dividing 1980 by 421, we get 4 with a remainder of 296.
Put 4 as the next digit of the answer. 
Result so far: 190362.24
The remainder is 296 after subtracting 1684 from 1980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 11:
2960 divided by 421 is 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 190362.247
Subtracting 2947 from 2960 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 12:
421 goes into 130 0 times with a remainder of 130.
The next digit of our result is 0. 
Result so far: 190362.247
Subtract 0 from 130 to get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Moving on to step 13:
421 can be fit into 1300 3 times, resulting in a remainder of 37.
The next digit of our result is 3. 
Result so far: 190362.24703
Deduct 1263 from 1300 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 14:
The number 421 fits into 370 0 times, leaving a remainder of 370.
The number 0 becomes the next digit in our result. 
Result so far: 190362.24703
If we take 0 away from 370, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 15:
421 can be fit into 3700 8 times, resulting in a remainder of 332.
Use 8 as the next digit of our solution. 
Result so far: 190362.2470308
Subtract 3368 from 3700 to get 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

Step 16:
421 can be fit into 3320 7 times, resulting in a remainder of 373.
Record the quotient 7 as the next digit in the result. 
Result so far: 190362.24703087
Subtract 2947 from 3320 to get 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

The final result is 190362.24703087 with a remainder of 3.73e-07.