We look at the division of 51435397 by 149 
We want to divide 51435397 by 149.

Moving on to step 1:
149 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 149

Let's proceed to step 2:
149 can be fit into 51 0 times, resulting in a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Grab the next digit (4) from the dividend, add it to 51, then carry on: 514 / 149

Let's proceed to step 3:
If we divide 514 by 149, we get 3 and a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 447 from 514, we get 67.
Fetch the next digit (3) from the dividend, attach it to 67 and continue: 673 / 149

Let's proceed to step 4:
673 divided by 149 is 4 with a remainder of 77.
Write down 4 as next digit of the result. 
Result so far: 34.0
The remainder is 77 after subtracting 596 from 673.
Fetch the next digit (5) from the dividend, attach it to 77 and continue: 775 / 149

Advancing to step 5:
If we divide 775 by 149, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 345.0
If we take 745 away from 775, we end up with 30.
Take the next digit (3) from the dividend and append it to 30, then repeat: 303 / 149

Advancing to step 6:
149 goes into 303 2 times with a remainder of 5.
The next digit of our result is 2. 
Result so far: 3452.0
The remainder is 5 after subtracting 298 from 303.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 149

Step 7:
When dividing 59 by 149, we get 0 with a remainder of 59.
The next digit of our result is 0. 
Result so far: 34520.0
Subtract 0 from 59 to get 59.
Take the next digit (7) from the dividend and append it to 59, then repeat: 597 / 149

On to step 8:
149 can be fit into 597 4 times, resulting in a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 345204.0
If we subtract 596 from 597, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
The number 149 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 345204.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
149 goes into 100 0 times with a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 345204.0
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 345204.0, with a leftover of 0.1.