Multi Calculator raise your calculating power with six linked calculators on a single screen.
Forget the various "M" buttons on a conventional calculator. With Multi Calculator HD,
you have six (landscape) or four (portrait) simultaneous calculators at your fingertips.
Drag numbers from one calculator to the other, or double tap on a number for copy/paste. Simple and intuitive, Multi Calculator gives
you the great power you need for the most complex projects.

Instruction:

Press the function key "F1" on all the other calculators (F2,F3,F4,F5,F6) to drag the numbers displayed on F1 calculator.
Press the function key "F2" on all the other calculators (F1,F3,F4,F5,F6) to copy the numbers displayed on F2 calculator.
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With such nice designed function, why do you need to bother the "M" buttons which make the calculation so damn difficult?

Now, start your project easily and relax......