We look at the division of 660398 by 42 
We want to divide 660398 by 42.

Moving on to step 1:
The number 42 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 42

Let's proceed to step 2:
42 goes into 66 1 times with a remainder of 24.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 42 from 66, we get 24.
Append the next digit (0) from the dividend to 24 and continue with: 240 / 42

Let's proceed to step 3:
If we divide 240 by 42, we get 5 and a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 30 after subtracting 210 from 240.
Grab the next digit (3) from the dividend, add it to 30, then carry on: 303 / 42

Moving on to step 4:
42 can be fit into 303 7 times, resulting in a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 157.0
If we take 294 away from 303, we end up with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 42

Going ahead to step 5:
42 goes into 99 2 times with a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 1572.0
If we subtract 84 from 99, we get 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 42

Going ahead to step 6:
42 can be fit into 158 3 times, resulting in a remainder of 32.
Write down 3 as next digit of the result. 
Result so far: 15723.0
If we subtract 126 from 158, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 7:
When dividing 320 by 42, we get 7 with a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 15723.7
Deduct 294 from 320 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 8:
260 divided by 42 is 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 15723.76
If we subtract 252 from 260, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
80 divided by 42 is 1 with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 15723.761
Deduct 42 from 80 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 10:
380 divided by 42 is 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 15723.7619
The remainder is 2 after subtracting 378 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 11:
42 can be fit into 20 0 times, resulting in a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 15723.7619
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 12:
If we divide 200 by 42, we get 4 and a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 15723.761904
If we subtract 168 from 200, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 13:
42 can be fit into 320 7 times, resulting in a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 15723.7619047
Deduct 294 from 320 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 14:
260 divided by 42 is 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 15723.76190476
Deduct 252 from 260 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 15723.76190476 with a balance of 8e-09.