Use fitness pal as was suggested and learn the caloric values of the different foods you eat for a week. After a while you’ll just know that a boneless skinless chicken breast medium is x number of calories.
Your macronutrients: protein 30%, fat 35%, carbs 35%
To maintain your current weight requires about 3,301 Calories per day.
To reach your goal of 80 kg in 75 days at your current body weight and activity level, requires about:
4,595 Calories per day
I would suggest you work out every other day lifting weights exclusively no machines - just you and the oly bar - do Rippeys Starting strength. Rest is key for mass.
To reach your caloric goal:
3 palm-sized portions (or 180 g) of protein per day
That's 45 g per meal.
FOR EXAMPLE
Chicken
Tofu
Fish
Greek yogurt
6 - 8 fist-sized portions of veggies per day
That's 1 or 2 total fists per meal.
FOR EXAMPLE
Spinach
Carrots
Cauliflower
Tomatoes
16 cupped handfuls (or 484 g) of carbs per day
That's 4 total handfuls or 121 g per meal.
FOR EXAMPLE
Beans
Blueberries
Sweet potatoes
Oats
20 thumb-sized portions (or 215 g) of healthy fats per day
That's 5 total thumbs or 54 g per meal.
FOR EXAMPLE
Olive oil
Walnuts
Guacamole
Flax seeds
If you follow something like what is detailed above, you’ll get close to your target weight, lean, in 90 days. That’s about 4 meals a day. You will eating and using the bathroom all the time, get used to it, it’s half again your current caloric intake.
good luck