结果为143
设D边长为x,则C,E,,F,B的边长为x,x+1,x+2,x+3
得:2x^2+(x+1)^2+(x+2)^2+(x+3)^2+1=(2x+x+1)(x+1+x+2)
x=4
则面积为6x^2+11x+3=143