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Need to check your math, but no adding machine available and you've run out of fingers ?
Call the number on your screen and use your touch-tone or dial telephone as an adding machine to punch in the list.
# for + (or + last entry),
* for - (or - last entry),
*# to hear subtotal,
#*
to hear total and clear.
Long distance charges may apply.
US 5,949,857
http://www.google.com/patents/US5949857
Telephone DTMF signal accessible data processor with calculator program [the porpoise, Oct 08 2014]
Telecaster
http://www.abalonev...ar_elite_photos.htm
[normzone, Oct 08 2014]
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## for multiply
** for divide
There could be a book of ever more complicated codes for different functions, e.g. **#*## for sqrt, or ••####*## for arcsin. |
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'###' could be used to get at all the unusual functions, using the letters which are printed on your phone's keypad to identify them, so ###74 is Pi, ###76 ("sn") is Sin, ###27 ("cs") is Cos, ###39 ("ex") is exponent, etc. |
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So, it pains me to [link]. |
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