View Compilation Error

0_0_34298861_3887.cpp:8:9: error: stray '\' in program
         printf("%.3lf\n",(4.0\3)*pi*a*a*a);
         ^
0_0_34298861_3887.cpp: In function 'int main()':
0_0_34298861_3887.cpp:5:21: error: expected initializer before numeric constant
     const double pi 3.1415927;
                     ^
0_0_34298861_3887.cpp:8:31: error: expected ')' before numeric constant
         printf("%.3lf\n",(4.0\3)*pi*a*a*a);
                               ^
0_0_34298861_3887.cpp:8:43: error: expected ')' before ';' token
         printf("%.3lf\n",(4.0\3)*pi*a*a*a);
                                           ^