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https://github.com/Kiritow/OJ-Problems-Source.git
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14 lines
226 B
C++
14 lines
226 B
C++
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#include<stdio.h>
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int main()
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{
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int t;
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scanf("%d",&t);
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while(t--)
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{
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double u,v,w,l;
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scanf("%lf %lf %lf %lf",&u,&v,&w,&l);
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printf("%.3f\n",(l/(u+v))*w);
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}
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return 0;
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}
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