Yoko wants to make 18 small identical squares and 20 large identical squares using wire. She has made 7 small squares and 3 large ones using 420 cm of wire. The length of wire she used for 3 large squares is the same as that for 7 small squares.
- How many large squares can be made with the same length of wire used to make 7 small squares?
- What is the length of wire she needs to make the remaining squares? Express your answer in cm.