#include <stdio.h>

int main(int argc, const char * argv[]) {

int a=4;
int b=9;
int t;
int c=a*b;
if(a<b)
{
    t=a;
    a=b;
    b=t;
}
while(b!=0)
{
    t=a%b;
    a=b;
    b=t;
}//此时，a为最小公因数
c/=a;
printf("%d\n",c);

return 0;

}