// Out
{
  type: "FunctionExpression",
  params: [
    {
      type: "Identifier",
      name: "n"
    }
  ],
  body: {
    type: "BlockStatement",
    body: [
      {
        type: "ReturnStatement",
        argument: {
          type: "BinaryExpression",
          right: {
            type: "Identifier",
            name: "n"
          },
          left: {
            type: "Identifier",
            name: "n"
          },
          operator: "*"
        }
      }
    ]
  }
}