URGENT!!!! I NEED HELP ASAP, WILL MARK BRAINLIEST IF YOU PROVIDE A WELL DONE EXPLANATION!!

Answer:
18x31=558
Step-by-step explanation:
Pretty sure this is the correct answer because it's been a while since I have done this type of stuff.
Answer:
81x31=588
Step-by-step explanation:
Pretty sure!
Please mark brainliest!