text: import * as actionTypes from './actionTypes.js';
  
  export function add(value) {
         return {
             type: actionTypes.ADD,
             value
         };
  }
  
  export function subtract(value) {
      return {
          type: actionTypes.SUBTRACT,
          value
      };
  }
  
  export function multiply(value) {
      return {
          type: actionTypes.MULTIPLY,
          value
      };
  }
  
  export function divide(value) {
      return {
          type: actionTypes.DIVIDE,
          value
      };
  }