1 meter = 100 cm
So 3.5*100=350 cm
Next divide 350 by the 15.5 cm and you should get 22.580 and so on, however you are only required to find how many you can make (the whole number) so therefore the answer is
22
(If you do need to add the decimal it’s either 22.58 or 22.6 or 22.50