w1, a 2-letter word is ……an Italian river.
w2, a 4-letter word is .…an English noun.
w3, a 3-letter word is ……another English noun.
w4, a 6-letter word is .……a name of European country.

Solve the alphametic:
W2*W3=W4
knowing that:
w4 is a concatenation of w1 and w2
while
"w2 and w3" was a name of a long-running TV series in Canada.