400 of 900 is about 44.44%.
400 + 900 + 1000 = 2300
400 and 900 are squares of 20 and 30, respectively.
400 ft * 900 ft = 8.26 acres, approx.
400 + 500 = 900
Three times one hundred equals three hundred
1400
900
900
900
It is: 800+100 = 900
400 times 9 is 3600!