Rule of Proportion PRO 对比 吉辰萬年曆－吉辰良日，四時有序 的使用情况和统计数据

Proportions are no problem anymore. For this, only 3 of 4 variables must be entered. All calculations are stored in the history. The final solution can be shared. [ Content ] - the variables must be entered - calculation with the rule of proportion - history function that saves input - detailed solution - the entering of fractions and decimals is supported - constants can be entered - no ads! [ Usage ] - there are 4 fields for entering the values ​​using a modified keyboard - if you have entered wrong values or values are missing, the text fields are highlighted - you can switch between the solution, input view and history by swiping and / or touching the buttons - the entries in the history can be deleted or sorted manually - if you select an entry in the history, it will be loaded automatically for the calculation - the entire history can be deleted by pressing a key