How many minutes did it take for the minute hand to move from the number 5 to the number 8?
分针由数字5走到数字8，经过了多少分钟．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<result>15</result>