#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
lcd.init();
lcd.backlight();
}

void loop() {
 int data=0;
lcd.setCursor(0, 0); 
lcd.print("penjumlahan");
delay(1000);
lcd.clear();
lcd.print(" 10 * 50 ");
data = 10 * 50;
delay(1000);
lcd.clear();
lcd.print(data);
delay(1000);

}