| 摘要 |
<p>PURPOSE:To facilitate to allow the result of exchange rate conversion to be understood by providing two display output devices so as to display the monetary rate of dollars being international currency and other two currencies than dollars of two countries (such as Japan and a visiting country) in total three countries on each display device. CONSTITUTION:At first the exchange rate input mode is selected by depressing an F key of an input key 2' and then the own country exchange rate with respect to dollars is entered by a C2 key and a ten-key. Succeedingly, a currency of a country other than dollars such as an exchange rate of a visiting country is entered similarly by a C2 key and the ten-key. In the practical use, at first the exchange rate mode is selected by using the F key, after the C1 key is depressed for dollars, the C2 key for own country currency and the C3 key is depressed for a visiting country, the monetary amount is entered by using the ten-key then outputs are given on display devices 5',6' and 7'. That is, the information of the exchange rate or the monetary amount entered from the input device 2 is given to a storage device 3, the information is converted at an arithmetic unit 1 by using the information of the storage device storing an arithmetic formula of exchange rate calculation and the currency monetary amount for three countries is displayed on the display devices 5', 6' and 7' via output devices 5, 6, 7.</p> |
