The minute hand of a clock is 10 cm long, how many cm does the minute hand travel from the number 1 to the number 7?
一个钟表的分针长10cm，从数字1走到数字7，分针走过了多少cm．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 10 * 1</gadget>
<output>31.4</output>

<result>31.4</result>