When we talk about dealing with problems calmly we are not talking about you dying slowly or calmly without opening up no, at this point you voice out.
But I think the one been referred to is dealing with the problems in outspoken but a calmly way, outspoken in the Sense that you won't go about causing more problems for yourself or reacting to it in a negative and violence way.
Calmly in the Sense that you take it to God in prayers for he sees our heart and hears our calm and silent prayers that we made to him not going the other way round that will lead to distruction.
There is no problems that has been recorded to have been solved with force or with violence or with worry.
Calmness comes from a spirit that is dominated by faith
One of the ways I have come to learn on how to deal with problems calmly is to always take it to God in prayers
That is the best way