Chicago 106 miles problem

Hello i got the question but still iā€™m unclear with the output could you please explain me how 61.2 came as an output

hello @msid78641
you can use the probability multiplication property in this question,in given sample case the maximum probability path will be 1 -> 4 -> 3 -> 5 and ans is 61.200000 using calculation:
61.200000 = 85(1ā€“>4)*90(4ā€“>3)*80(3ā€“>5).