To make a tomato pizza topping for a normal pizza, Jake uses 300g of tomatoes, 120g of onions and 75g of mushrooms. Jake wants enough sauce for a giant pizza, so he uses 900g of tomatoes. Jake has now made his giant pizza. He says, ‘I made three times as much sauce to cover the giant pizza as I do to cover a normal pizza, so the giant pizza is three times as big as the normal pizza.' Do you agree with Jake and explain your answer?