如何在Reason React中使用模运算符？

/* MyComponent.re */
open React;

let component = ReasonReact.reducerComponent("MyComponent");

type state = {
  count: int,
};

type action =
  | Increment
  | Decrement;

let make = (_children) => {
  ...component,
  initialState: () => {count: 0},
  reducer: (action, state) =>
    switch (action) {
    | Increment =>
      ReasonReact.Update({count: state.count + 1})
    | Decrement =>
      ReasonReact.Update({count: state.count - 1})
    },
  render: self => {
    let remainder = self.state.count % 3;
    <div>
      <h1>Count: {string_of_int(self.state.count)}</h1>
      <h2>Remainder when divided by 3: {string_of_int(remainder)}</h2>
      <button onClick={_event => self.send(Increment)}>Increment</button>
      <button onClick={_event => self.send(Decrement)}>Decrement</button>
    </div>
  },
};