Simple program

[Flippy]

Hi all,
Many years ago, I bought a new HP 32s RPN calculator (yes, I'm old).
Long story short, one of my co-workers dropped it in a tank of water and it sat over the weekend.
So, I tossed it and moved on with a cheap TI-30 but could not get used to it (no RPN).
so, I bought a slightly used 35s.
my problem is I can't get it to work like I'm used to my 32s.
Here is the simple program...

PRGM TOP
M001 LBL M
M002 INPUT I
M003 25.4
M004 ×
M005 STO M
M006 R↓
M007 FIX 3
M008 INPUT M
M009 25.4
M010 ÷
M011 STO I
M012 FIX 5
M013 R↓
M014 GTO M001

the problem I'm having is when its waiting for input, I should be able to add, subtract,
or do anything I want before making the conversion (R/S). I know this is an easy fix but
still, I'm at a loss.

could someone please give me the answer?
Thanks
Bob P.