The no of elements in the left array defines the no of rows in the result. The no of elements in the right array defines the no of cols in the result
A vector of (hours,minutes,seconds) needs to be converted to seconds
This can be achieved by multiplying with the appropriate no of seconds:
This can also be achieved by using an Inner Product
Note also: ∨/m∧.=⍉↑(2⊃⍴m)↑¨'Bush' 'Clinton'