Pls help me with his math question!! (Added photo)

Answer:
output for 2.35 is 13.4
output for 42 is 172
Step-by-step explanation:
This is quite simple really. You just add 1 to the number in the input box, then multiply that number by 4. For example: 42 + 1 = 43, 43 * 4 = 172.