diff --git a/src/eval.rs b/src/eval.rs
index 3d486e8..feedf85 100644
--- a/src/eval.rs
+++ b/src/eval.rs
@@ -20,13 +20,16 @@ impl Evaluator {
                 }
             },
             Expr::Binary { op, left, right } => {
+                let lhs = self.eval_expr(*left);
+                let rhs = self.eval_expr(*right);
+                
                 match op {
-                    BinaryOp::Add => self.eval_expr(*left) + self.eval_expr(*right),
-                    BinaryOp::Sub => self.eval_expr(*left) - self.eval_expr(*right),
-                    BinaryOp::Mul => self.eval_expr(*left) * self.eval_expr(*right),
-                    BinaryOp::Div => self.eval_expr(*left) / self.eval_expr(*right),
-                    BinaryOp::Mod => self.eval_expr(*left) % self.eval_expr(*right),
-                    BinaryOp::Exp => self.eval_expr(*left).pow(self.eval_expr(*right) as u32) // probably shouldn't cast like that
+                    BinaryOp::Add => lhs + rhs,
+                    BinaryOp::Sub => lhs - rhs,
+                    BinaryOp::Mul => lhs * rhs,
+                    BinaryOp::Div => lhs / rhs,
+                    BinaryOp::Mod => lhs % rhs,
+                    BinaryOp::Exp => lhs.pow(rhs as u32) // probably shouldn't cast like that
                 }
             },
             expr => panic!("can't eval expression: {expr:?}")