https://github.com/Arachnid/uscc/tree/master/submissions-2017/alexvandesande

[JackGod001]

I don't quite understand the effect of the order of multiplication, and I think that as long as the decimal number is 0 in the formula, the result will be 0.

    myTokens = contribution[msg.sender] * decimalCases / totalContributed;

contribution[msg.sender] * (decimalCases / totalContributed); decimalCases=0 result=0
(contribution[msg.sender] * decimalCases) / totalContributed; decimalCases=0 result=0

What kind of sequential control can avoid getting a result of 0?