思路：最小公倍數=兩個數相乘除以兩個數的最大公約數。

AC程式碼：

#include <iostream>
#include <cstdio>
using namespace std;

unsigned int gcd(unsigned int t1,unsigned int t2)
{
    if(t2==0) return (t1);
    else return gcd(t2,t1%t2);
}

int main(void)
{
    freopen("in.txt","r",stdin);
    unsigned int N;
    scanf(
 
"%ud",&N);
    while(N--)
    {
        unsigned int n,t1,t2;
        scanf("%u",&n);
        scanf("%u",&t1);
        n--;
        while(n--)
        {
            scanf("%u",&t2);
            t1=t1/gcd(t1,t2)*t2;
        }
        printf("%u\n",t1);
    }

    fclose(stdin);
    return
 
 0;
 }