Because you usually use a small oven at home, you can't practice the same amount as a practical exam.
This app calculates different ingredients at the same rate based on the amount of one material.

Ex) When making chocolate muffins, if you break the egg and weigh 50g, calculate the weight of the other ingredients at a time of 83.33g, 50g sugar, 50g butter, and 0.83g salt.