Answer:
2500
Step-by-step explanation:
what you have to do is get a calculator and do 50x50 or you can look up a calculator also or what you can do is do 5x5 and you will get 25 but then add the 2 0's to the end like so 2500 this way ONLY works if you are doing 50x50 20x20 or even 100x100 etc
hoped this would help you :D
