#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <Servo.h>

LiquidCrystal_I2C lcd(0x27,16,2);//display setup

/*keypad setup*/
const byte K_ROWS = 4;
const byte K_COLS = 4;
byte rowPins [K_ROWS]={6,5,4,3};
byte colPins [K_COLS]={10,9,8,7};
char keys[K_ROWS][K_COLS]={
  {'1','2','3','+'},
  {'4','5','6','-'},
  {'7','8','+','*'},
  {'.','0','=','/'},
};

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, K_ROWS, K_COLS);

uint64_t value =0;

void setup() {
  

}

void loop() {
  // put your main code here, to run repeatedly:

}