| 摘要 |
<p>This invention relates to a clock for automatic calculation for consecutive adding and subtracting. An objective of the invention is to allow a user to check an interest on a saving or a loan in units of hour/minute/second in order to facilitate tracking of increase in property and/or debt of the user. To achieve the object, the invention comprises a key input unit (11) to allow a user to input amount and an interest rate to find annual interest; a micro processor (12) to read numbers that the user entered through the key input unit (11) in the order of interest rate calculation, calculate the total amount x interest rate/total time (hour/minute/second) of one year and convert the calculated value in units of hour to display the converted value in an interest display (14) or perform a function as a clock through a watch display (13); and an interest display (14) that shows the calculated interest in units of an hour (or minute/second) according to the control of the micro processor. The invention allows the user to check a gain to the interest on saving or loan in addition to the conventional function of a watch, so that the user can feel encouraged to save more or make a determination to pay back a loan as soon as possible.</p> |
