We look at the division of 42401418 by 421 
Our goal is to divide 42401418 by 421.

Moving on to step 1:
421 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 421

Step 2:
The number 421 fits into 42 0 times, leaving a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (4) from the dividend and append it to 42, then repeat: 424 / 421

Let's proceed to step 3:
The number 421 fits into 424 1 times, leaving a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 421 from 424 to get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 421

Let's proceed to step 4:
30 divided by 421 is 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 30 to get 30.
Include the next digit (1) from the dividend after 30, then repeat: 301 / 421

Going ahead to step 5:
When dividing 301 by 421, we get 0 with a remainder of 301.
Use 0 as the next digit of our solution. 
Result so far: 100.0
Subtract 0 from 301 to get 301.
Grab the next digit (4) from the dividend, add it to 301, then carry on: 3014 / 421

On to step 6:
The number 421 fits into 3014 7 times, leaving a remainder of 67.
Put 7 as the next digit of the answer. 
Result so far: 1007.0
If we subtract 2947 from 3014, we get 67.
Bring next digit (1) of the dividend behind the 67 and repeat the process: 671 / 421

Let's proceed to step 7:
421 goes into 671 1 times with a remainder of 250.
Record the quotient 1 as the next digit in the result. 
Result so far: 10071.0
Subtracting 421 from 671 leaves us with 250.
Grab the next digit (8) from the dividend, add it to 250, then carry on: 2508 / 421

Let's proceed to step 8:
421 can be fit into 2508 5 times, resulting in a remainder of 403.
Write down 5 as next digit of the result. 
Result so far: 100715.0
Deduct 2105 from 2508 and we're left with 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Going ahead to step 9:
The number 421 fits into 4030 9 times, leaving a remainder of 241.
Record the quotient 9 as the next digit in the result. 
Result so far: 100715.9
Subtract 3789 from 4030 to get 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Going ahead to step 10:
When dividing 2410 by 421, we get 5 with a remainder of 305.
Put 5 as the next digit of the answer. 
Result so far: 100715.95
If we take 2105 away from 2410, we end up with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Advancing to step 11:
If we divide 3050 by 421, we get 7 and a remainder of 103.
The next digit of our result is 7. 
Result so far: 100715.957
Subtracting 2947 from 3050 leaves us with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Advancing to step 12:
If we divide 1030 by 421, we get 2 and a remainder of 188.
The number 2 becomes the next digit in our result. 
Result so far: 100715.9572
Subtracting 842 from 1030 leaves us with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

On to step 13:
421 can be fit into 1880 4 times, resulting in a remainder of 196.
Put 4 as the next digit of the answer. 
Result so far: 100715.95724
If we subtract 1684 from 1880, we get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Advancing to step 14:
421 goes into 1960 4 times with a remainder of 276.
Put 4 as the next digit of the answer. 
Result so far: 100715.957244
The remainder is 276 after subtracting 1684 from 1960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Our division results in 100715.957244 with a remaining 2.76e-05.