If it takes 6 minutes to cut a piece of wood into 6 pieces, how many minutes will it take to finish sawing the piece of wood?
把一根木头锯成6段，每锯断一次需要6分钟，锯完这根木头一共需要多少分钟．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<result>30</result>