Rule of Three 对比 N3 Listening 的使用情况和统计数据

We do Rule of Three's calculations, also known as cross multiplication, several times a day, often without even realizing it. This application has been made to make your life easier, making it possible, in seconds, to solve issues that are common in our daily lives, such as changing quantities of ingredients in recipes, calculating fuel consumption, finding any kind of quantities that are proportional, etc. Rule of Three is a simple, useful and free app.