Triangle $ABC$ and triangle $DEF$ are congruent, isosceles right triangles. The square inscribed in triangle $ABC$ has an area of 15 square centimeters. What is the area of the square inscribed in triangle $DEF$? Express your answer as a common fraction.

[asy]
draw((0,0)--(2,0)--(0,2)--(0,0)--cycle,linewidth(2));
draw((0,0)--(1,0)--(1,1)--(0,1)--(0,0)--cycle,linewidth(2));
draw((1/8,0)--(1/8,1/8)--(0,1/8),linewidth(1));

draw((3,0)--(5,0)--(3,2)--(3,0)--cycle,linewidth(2));
draw((3+2/3,0)--(3+4/3,2/3)--(3+2/3,4/3)--(3,2/3)--(3+2/3,0)--cycle,linewidth(2));
draw((3+1/8,0)--(3+1/8,1/8)--(3,1/8),linewidth(1));

label("A",(0,2),NW);
label("B",(0,0),SW);
label("C",(2,0),SE);

label("D",(3,2),NW);
label("E",(3,0),SW);
label("F",(5,0),SE);

[/asy]
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Triangle $ABC$ and triangle $DEF$ are congruent, isosceles right triangles. The square inscribed in triangle $ABC$ has an area of 15 square centimeters. What is the area of the square inscribed in triangle $DEF$? Express your answer as a common fraction.

[asy]
draw((0,0)--(2,0)--(0,2)--(0,0)--cycle,linewidth(2));
draw((0,0)--(1,0)--(1,1)--(0,1)--(0,0)--cycle,linewidth(2));
draw((1/8,0)--(1/8,1/8)--(0,1/8),linewidth(1));

draw((3,0)--(5,0)--(3,2)--(3,0)--cycle,linewidth(2));
draw((3+2/3,0)--(3+4/3,2/3)--(3+2/3,4/3)--(3,2/3)--(3+2/3,0)--cycle,linewidth(2));
draw((3+1/8,0)--(3+1/8,1/8)--(3,1/8),linewidth(1));

label("A",(0,2),NW);
label("B",(0,0),SW);
label("C",(2,0),SE);

label("D",(3,2),NW);
label("E",(3,0),SW);
label("F",(5,0),SE);

[/asy]
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{40}{3}
Triangle $ABC$ and triangle $DEF$ are congruent, isosceles right triangles. The square inscribed in triangle $ABC$ has an area of 15 square centimeters. What is the area of the square inscribed in triangle $DEF$? Express your answer as a common fraction.

[asy]
draw((0,0)--(2,0)--(0,2)--(0,0)--cycle,linewidth(2));
draw((0,0)--(1,0)--(1,1)--(0,1)--(0,0)--cycle,linewidth(2));
draw((1/8,0)--(1/8,1/8)--(0,1/8),linewidth(1));

draw((3,0)--(5,0)--(3,2)--(3,0)--cycle,linewidth(2));
draw((3+2/3,0)--(3+4/3,2/3)--(3+2/3,4/3)--(3,2/3)--(3+2/3,0)--cycle,linewidth(2));
draw((3+1/8,0)--(3+1/8,1/8)--(3,1/8),linewidth(1));

label("A",(0,2),NW);
label("B",(0,0),SW);
label("C",(2,0),SE);

label("D",(3,2),NW);
label("E",(3,0),SW);
label("F",(5,0),SE);

[/asy]
train