#include<bits/stdc++.h>
int main()
{
long long n,m,a,b,c,i,s;
while(scanf("%lld",&n)==1)
while(n--)
{
s=0;
scanf("%lld",&m);
for(i=1; i<=m; i++)
{
scanf("%lld%lld%lld",&a,&b,&c);
s+=a*c;
}
printf("%lld\n",s);
}
return 0;
}
int main()
{
long long n,m,a,b,c,i,s;
while(scanf("%lld",&n)==1)
while(n--)
{
s=0;
scanf("%lld",&m);
for(i=1; i<=m; i++)
{
scanf("%lld%lld%lld",&a,&b,&c);
s+=a*c;
}
printf("%lld\n",s);
}
return 0;
}
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