error[E0277]: cannot multiply `i32` by `f32` --> $DIR/binop-mul-i32-f32.rs:2:7 | LL | x * y | ^ no implementation for `i32 * f32` | = help: the trait `Mul` is not implemented for `i32` = help: the following other types implement trait `Mul`: <&'a i32 as Mul> <&i32 as Mul<&i32>> > error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.