How many oars do you use to row a gondola?

Explanation

Venice is a city in Italy made up of 118 islands and many channels, where you sail in gondolas. A gondola is a long, narrow boat. It is driven by a gondolier, who stands at the back and pushes the gondola up with an oar. It is believed that there were several thousand gondolas in the 18th century. Today there are only a few hundred, mainly used by tourists.