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Instructions for Everest M4/Contarapid (M. Landwehr)

Rough translation:

Let me call "MFC" the multi-function command on the right.

ADDITION:

Insert numbers and press MFC after each adder.

Pressing twice MFC you get partial sum. Register is not cleared and

you can add other adders.

Moving right the MFC you get the definitive total sum.

SUBTRACTION:

Insert first number and press MFC.

Insert second number and move left MFC, then press it.

Result will be computed and kept in register. You can use it for other operations.

Moving right the MFC you get the definitive total result.

MULTIPLICATION:

Insert first number (DON'T press MFC) and press X key.

Press as much zero keys as many digits of multiplier are.

Insert multiplier digits using dialer.

Move twice MFC toward right to get the result.

DIVISION:

Insert first number, press MFC and then press red divide key (÷).

Insert divisor adding some zeros: dividend and divisor need to have

the same number of digits.

Move forward the big red button to get the result.

Result is written on the left, in the same line.

Remainder ... non clear :-(

My guess: at each division, divider loss a digit (beginning from dummy 0s).
When it loss a significative digit you consider:

a= last divider

b= last result

c= last number written on the right

remainder= a*b+c

Division example: 559/23= 24,0304347

remainder = 2x3+1 = 7

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