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16*16
03, 01, 06;
04, 01, 07;
05, 02, 07;
06, 04, 08;
07, 05, 09;
08, 06, 09;
09, 06, 11;
10, 07, 12;
11, 08, 12;
12, 09, 13;
13, 05, 14;
14, 04, 15;
15, 03, 16;

2^2=4; 2^3=8; 2^4=16; 2^5=32; 2^6=64; 2^7=128; 2^8=256; 2^9=512
2^10=1024
2^20=1048576
2^30=1073741824
2^40=1099511627776
2^50=1125899906842624
2^60=1152921504606846976
2^70=1180591620717411303424
2^80=1208925819614629174706176
2^90=1237940039285380274899124224
2^91=2475880078570760549798248448=2.4758800785707605e+27
2^100=1267650600228229401496703205376=1.2676506002282294e+30
2^256=1.1579208923731619542357098500869e+77

10!=3628800
20!=2432902008176640000
30!=2.6525285981219105863630848e+32
40!=8.1591528324789773434561126959612e+47
50!=3.0414093201713378043612608166065e+64
60!=8.3209871127413901442763411832234e+81
70!=1.1978571669969891796072783721689e+100
80!=7.1569457046263802294811533723187e+118
90!=1.4857159644817614973095227336208e+138
100!=9.3326215443944152681699238856267e+157
256!=8.5781777534284265411908227168123e+506
91!=1.352001527678402962551665687595e+140
165!=5.4239106661315887749844950142128e+295
C(256,91)=1.1697830683350362978815292570592e+71

360*640=230400
800*600=480000
1024*768=786432
1366*768=1049088
1400*900=1260000
1920*1080=2073600
4096*2160=8847360

天: 365*85=31025
时: 365*85*24=744600
分: 365*85*24*60=44676000
秒: 365*85*24*60*60=2680560000
365*24*60*60=3153600