Update EIP-2537: Clarify the gast cost calculation formula for MSM

EIPS/eip-2537.md

@@ -248,7 +248,7 @@ Assuming `EcRecover` precompile as a baseline.
 
 MSMs are expected to be performed by Pippenger's algorithm (we can also say that it **must** be performed by Pippenger's algorithm to have a speedup that results in a discount over naive implementation by multiplying each pair separately and adding the results). For this case there was a table prepared for discount in case of `k <= 128` points in the MSM with a discount cap `max_discount` for `k > 128`.
 
-To avoid non-integer arithmetic, the call cost is calculated as `(k * multiplication_cost * discount) / multiplier` where `multiplier = 1000`, `k` is a number of (scalar, point) pairs for the call, `multiplication_cost` is a corresponding G1/G2 multiplication cost presented above.
+The call cost is calculated as `(k * multiplication_cost * discount) // multiplier` where `multiplier = 1000`, `k` is a number of (scalar, point) pairs for the call, `multiplication_cost` is a corresponding G1/G2 multiplication cost presented above and `//` is an integer division.
 
 G1 and G2 are priced separately, each having their own discount table and `max_discount`.
 
@@ -299,7 +299,7 @@ k = floor(len(input) / LEN_PER_PAIR);
 if k == 0 {
   return 0;
 }
-gas_cost = k * multiplication_cost * discount(k) / multiplier;
+gas_cost = k * multiplication_cost * discount(k) // multiplier;
 return gas_cost;
 ```