C＃中的交叉乘法

Question

I've two scenarios where I have to find result based on parameters(by doing cross multiplication). Those scenarios are as following:

For example,

Scenario - 1:

int previousConceptCount = 100
int currentConceptCount = 20
int previousTime = 10
int currentTime = ?

Que: If 100 concepts take 10 mins to complete than how much time 20 concepts will take?
Ans: 
currentTime = (currentConceptCount * previousTime) / previousConceptCount //Works fine

//Mathematical calculation which I've added in code.  
  100     10
 ----- = -----  ==> x = (20(currentConceptCount) * 10(previousTime)) / 100(previousConceptCount)
  20       x  

Scenario - 2:

int previousConceptCount = 10
int currentConceptCount = 100
int previousDocumentCount = 100
int currentDocumentCount = 100
int previousTime = 10
int currentTime = ?

    Que: If 10 concepts with 100 documents take 10 mins than how much time 100 concepts with 100 documents will take?
Ans: 
    currentTime = ?

How to calculate currentTime in this kind of scenario. I'll always have conceptCounts(both previous and current) and documentCounts(both previous and current) and based on that I've to find time. I don't know what math formula will be needed or let me put it this way, I do not know how to calculate in this scenario.

Any suggestions?

Answer 1

您只需要将概念乘以文档即可：

(20(currentConceptCount*currentDocumentCount) * 10(previousTime)) / 100(previousConceptCount*previousDocumentCount)