题解 | #L1-2单位换算#
L1-2单位换算
https://ac.nowcoder.com/acm/contest/19304/R
#include<iostream>
using namespace std;
#include<iomanip>
int main()
{
double a;
cin>>a;
double b=a*12*2.54*10;
if(b==int(b))cout<<b;
else cout<<fixed<<setprecision(1)<<b<<endl;
}
