I just cant

If

$\frac{a+b}{c+d}=\frac{16}{15}$

then what is a,b,c and d?

Or just, what is abcd=?

Another possibly dumb question my classmate made and we tried to solve.

$\frac{9+7}{10+5}=\frac{16}{15}$

$a=9,\ b=7,\ c=10,\ d=5$

$abcd=9\times 7\times 10\times 5=3150$

Was that asked?

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