View Compilation Error

0_0_26076365_13785.cpp: In function 'pr mul(pr, pr)':
0_0_26076365_13785.cpp:52:2: error: 'pt' was not declared in this scope
  pt t =  pr(a.fi*b.fi % mod + a.se*b.se%mod*B%mod ,a.fi*b.se%mod+a.se*b.fi%mod);
  ^
0_0_26076365_13785.cpp:53:9: error: 't' was not declared in this scope
  return t;
         ^