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다른 해결 방법
138888889500000000
138888889500000000=138888889÷500000000.
138888889÷500000000
138888889→388888890→388888900→388889000→388890000→388900000→389000000→390000000, .
1388888890500000000=digit2,rema∈der388888890
388888890
3888888900500000000=digit7,rema∈der388888900
388888900
3888889000500000000=digit7,rema∈der388889000
388889000
3888890000500000000=digit7,rema∈der388890000
388890000
3888900000500000000=digit7,rema∈der388900000
388900000
3889000000500000000=digit7,rema∈der389000000
389000000
3890000000500000000=digit7,rema∈der390000000
390000000
3900000000500000000=digit7,rema∈der400000000
400000000
4000000000500000000=digit8,rema∈der0
0
0.277777778
138888889500000000=0.277777778
277,777,778()=0.277777778.
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