Verified Answer :

thats easy for example the first question 3.22.86.1=?
first multiply 3.22.8 which equals 8.96 then multiply that number times 6.1 so like this-> 8.966.1 which your answer is 54.656.
So answers for numbers 1-3 are
1) 54.656
2) 90
3) 15.603
enjoy!