19907840 ÷ 145 
Let's see how many times 145 fits into 19907840.

Advancing to step 1:
145 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 145

Step 2:
If we divide 19 by 145, we get 0 and a remainder of 19.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 19, we end up with 19.
Grab the next digit (9) from the dividend, add it to 19, then carry on: 199 / 145

On to step 3:
145 can be fit into 199 1 times, resulting in a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 145 away from 199, we end up with 54.
Include the next digit (0) from the dividend after 54, then repeat: 540 / 145

Step 4:
145 goes into 540 3 times with a remainder of 105.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we subtract 435 from 540, we get 105.
Fetch the next digit (7) from the dividend, attach it to 105 and continue: 1057 / 145

Let's proceed to step 5:
The number 145 fits into 1057 7 times, leaving a remainder of 42.
The number 7 becomes the next digit in our result. 
Result so far: 137.0
Subtracting 1015 from 1057 leaves us with 42.
Grab the next digit (8) from the dividend, add it to 42, then carry on: 428 / 145

Moving on to step 6:
145 can be fit into 428 2 times, resulting in a remainder of 138.
The number 2 becomes the next digit in our result. 
Result so far: 1372.0
If we subtract 290 from 428, we get 138.
Fetch the next digit (4) from the dividend, attach it to 138 and continue: 1384 / 145

Moving on to step 7:
145 goes into 1384 9 times with a remainder of 79.
Put 9 as the next digit of the answer. 
Result so far: 13729.0
The remainder is 79 after subtracting 1305 from 1384.
Append the next digit (0) from the dividend to 79 and continue with: 790 / 145

Moving on to step 8:
If we divide 790 by 145, we get 5 and a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 137295.0
Deduct 725 from 790 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 9:
650 divided by 145 is 4 with a remainder of 70.
The number 4 becomes the next digit in our result. 
Result so far: 137295.4
The remainder is 70 after subtracting 580 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 10:
700 divided by 145 is 4 with a remainder of 120.
Put 4 as the next digit of the answer. 
Result so far: 137295.44
If we take 580 away from 700, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Our division results in 137295.44 with a remaining 0.12.