refactor: more readable mem_total_pages implementation

frontend-wasm/src/code_translator/mod.rs

@@ -495,10 +495,11 @@ fn translate_br_table(
 
 /// Return the total Miden VM memory size (2^32 addresses * word (4 felts) bytes) in 64KB pages
 const fn mem_total_pages() -> i32 {
-    let bytes_fit_in_felt = 4; // although more than 32 bits can fit into a felt, use 32 bits to be safe
-    let felts_in_word = 4;
-    let total_addresses = u32::MAX as i64;
-    (total_addresses * (felts_in_word * bytes_fit_in_felt) / (64 * 1024)) as i32
+    const FELT_BYTES: u64 = 4; // felts are effectively 32 bits
+    const WORD_BYTES: u64 = 4 * FELT_BYTES; // 4 felts per word
+    const PAGE_SIZE: u64 = 64 * 1024;
+    const MEMORY_SIZE: u64 = u32::MAX as u64 * WORD_BYTES;
+    (MEMORY_SIZE / PAGE_SIZE) as i32
 }
 
 fn translate_load(