Sure thing! We've got 257293020 and 121133710, and we're going to subtract the second number from the first.

Step 1: We'll start by subtracting the digit 0 and the borrow 0 from 0 in column 1 and get 0.
0 is the first digit of our result.

Step 2: We'll start by subtracting the digit 1 and the borrow 0 from 2 in column 2 and get 1.
1 is the next digit of our result.

Step 3: We'll start by subtracting the digit 7 and the borrow 0 from 0 in column 3 and get -7.
We add -7 to 10 and get 3 as the next digit of the result.

Step 4: We'll start by subtracting the digit 3 and the borrow 1 from 3 in column 4 and get -1.
We add -1 to 10 and get 9 as the next digit of the result.

Step 5: We'll start by subtracting the digit 3 and the borrow 1 from 9 in column 5 and get 5.
5 is the next digit of our result.

Step 6: We'll start by subtracting the digit 1 and the borrow 0 from 2 in column 6 and get 1.
1 is the next digit of our result.

Step 7: We'll start by subtracting the digit 1 and the borrow 0 from 7 in column 7 and get 6.
6 is the next digit of our result.

Step 8: We'll start by subtracting the digit 2 and the borrow 0 from 5 in column 8 and get 3.
3 is the next digit of our result.

Step 9: We'll start by subtracting the digit 1 and the borrow 0 from 2 in column 9 and get 1.
1 is the next digit of our result.

So, 257293020 - 121133710 = 136159310.