计算:.l;g(c(F8{,t6K1c(q,`*D
2600+400=5J/A/s*r8y.l;g(c(F8{,t6K1c(q,`*D
算式:提示+u3U8o)b-U0p9t.l;g(c(F8{,t6K1c(q,`*D