Heat of steamed bread: 22 10 kcal/kg (9250 kj/kg)

Calories of vegetable thinning: 170 kcal/kg (7 10 kj/kg)

Then:

The calorie of 300 grams of cakes is: 646 calories (2703 kilojoules)

100g of steamed bread has a calorie of 22 1 kcal (925kJ).

The calorie of 200 grams of vegetables is: 34 calories (142 kilojoules)

The total heat is: 90 1 kcal (3770 kj)

Note: Calories are metric units of heat (domestic use), and kilojoules are English units of heat (international use).