import { logger } from './logger' ; export function add ( a , b ) { logger . log ( `addition of ${ a } and ${ b }` ) ; return a + b ; } export function subtract ( a , b ) { return a - b ; } export function divide ( a , b ) { return a / b ; } export function multiply ( a , b ) { return a * b ; } export function modulo ( a , b ) { return a % b ; }