・DEC calculator (real number)
Up to 20 digits display (including decimal point and sign).
10 digits for input and 11 digits for display after the decimal point.
Arithmetic precision conforms to BigDecimal.
If rounding occurs in the display, the last digit is displayed slightly smaller.
Supports continuous calculations.
　ex.[3][+][+][2.5][=] → 5.5
　 [=] → 8
　 [=] → 10.5 ...
It corresponds to the following special key input.
[3][.][.] → 3.14159265358979323846
[n][÷][=][=] → 1 / n
[n][×][=][=] → n×n
[n][－][=][=] → √n(square root / 0 <= n)

・INT calculator (integer)
Up to 20 digits display (including sign).
Supports continuous calculations.
　ex.[3][+][+][2][=] → 5
　 [=] → 7
　 [=] → 9 ...
It corresponds to the following special key input.
[AC][=][=] → calendar of the year
[n][=][=] → n year calendar

・HEX calculator (hexadecimal)
Maximum 64bit display.
Supports HEX conversion for decimal input ([>HEX] button).
Supports continuous calculations.
　ex.[3][+][+][A][=] → d
　 [=] → 17
　 [=] → 21 ...