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2_14855_1387494_27441.cpp: In function `void mul(double (*)[207], double (*)[207], double (*)[207])':
2_14855_1387494_27441.cpp:13: error: `t' undeclared (first use this function)
2_14855_1387494_27441.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)