Let's divide 42257021 by 148
We're looking to find how many times 148 goes into 42257021.

Step 1:
148 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 148

Advancing to step 2:
When dividing 42 by 148, we get 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Grab the next digit (2) from the dividend, add it to 42, then carry on: 422 / 148

On to step 3:
If we divide 422 by 148, we get 2 and a remainder of 126.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 296 from 422 and we're left with 126.
Fetch the next digit (5) from the dividend, attach it to 126 and continue: 1265 / 148

On to step 4:
When dividing 1265 by 148, we get 8 with a remainder of 81.
Put 8 as the next digit of the answer. 
Result so far: 28.0
If we subtract 1184 from 1265, we get 81.
Fetch the next digit (7) from the dividend, attach it to 81 and continue: 817 / 148

On to step 5:
148 can be fit into 817 5 times, resulting in a remainder of 77.
The number 5 becomes the next digit in our result. 
Result so far: 285.0
Deduct 740 from 817 and we're left with 77.
Bring next digit (0) of the dividend behind the 77 and repeat the process: 770 / 148

Let's proceed to step 6:
148 goes into 770 5 times with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 2855.0
The remainder is 30 after subtracting 740 from 770.
Grab the next digit (2) from the dividend, add it to 30, then carry on: 302 / 148

Advancing to step 7:
If we divide 302 by 148, we get 2 and a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 28552.0
Deduct 296 from 302 and we're left with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 148

Advancing to step 8:
If we divide 61 by 148, we get 0 and a remainder of 61.
Record the quotient 0 as the next digit in the result. 
Result so far: 285520.0
If we take 0 away from 61, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 9:
610 divided by 148 is 4 with a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 285520.4
Deduct 592 from 610 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 10:
180 divided by 148 is 1 with a remainder of 32.
Record the quotient 1 as the next digit in the result. 
Result so far: 285520.41
Subtract 148 from 180 to 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.

Let's proceed to step 11:
If we divide 320 by 148, we get 2 and a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 285520.412
If we subtract 296 from 320, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
148 goes into 240 1 times with a remainder of 92.
Record the quotient 1 as the next digit in the result. 
Result so far: 285520.4121
Subtract 148 from 240 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Let's proceed to step 13:
If we divide 920 by 148, we get 6 and a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 285520.41216
Subtracting 888 from 920 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 14:
320 divided by 148 is 2 with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 285520.412162
Deduct 296 from 320 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 15:
148 goes into 240 1 times with a remainder of 92.
Use 1 as the next digit of our solution. 
Result so far: 285520.4121621
The remainder is 92 after subtracting 148 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Going ahead to step 16:
920 divided by 148 is 6 with a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 285520.41216216
The remainder is 32 after subtracting 888 from 920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 285520.41216216, with a leftover of 3.2e-08.