#include <stdio.h>
int main()
{
int sum=0,x=0,y=0,z=0,i=0,j=0;
int cases=0,farmers=0;
scanf("%d",&cases);
for(i=0;i<cases;i++){
farmers=0;
sum=0;
scanf("%d",&farmers);
for(j=0;j<farmers;j++){
scanf("%d %d %d",&x,&y,&z);
sum+=x*z;
}
printf("%d\n",sum);
}
return 0;
}
int main()
{
int sum=0,x=0,y=0,z=0,i=0,j=0;
int cases=0,farmers=0;
scanf("%d",&cases);
for(i=0;i<cases;i++){
farmers=0;
sum=0;
scanf("%d",&farmers);
for(j=0;j<farmers;j++){
scanf("%d %d %d",&x,&y,&z);
sum+=x*z;
}
printf("%d\n",sum);
}
return 0;
}
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