Ключевые слова: account, asia, asian, background, calculate, calculator, caucasian, child, childhood, chinese, classes, cost, courses, education, elementary, female, finance, formula, girl, happy, hold, isolated, kid, knowledge, learn, lesson, little, mathematics, maths, numbers, people, person, pocket, preteen, pupil, red, result, school, schoolkid, show, small, smile, spectacles, study, sum, thai, white, young,