Consider the C program given below:

#include
int main ( )
{
float *ptr;
float arr[ ] = {1.4, 2.3, 8.4, 4.5, 6.6, 16.7, 7.8, 32.9, 9.1, 64.11, 11.12, 128.2};
ptr = arr + 7;
printf ("%.1f \n", ptr[3] + 4[ptr]);
return 0;
}

The output of the above-given code is _____.