View Compilation Error

0_0_37080488_16627.cpp:6:1: error: stray '\246' in program
 {printf("%.3lf",4/3*π*a*a*a);}
 ^
0_0_37080488_16627.cpp:6:1: error: stray '\320' in program
0_0_37080488_16627.cpp: In function 'int main()':
0_0_37080488_16627.cpp:6:24: error: invalid type argument of unary '*' (have 'double')
 {printf("%.3lf",4/3*π*a*a*a);}
                        ^