If it takes 30 seconds to saw a small stick into 3 pieces, how many seconds will it take to saw it into 6 pieces?
一根小棒锯成3段需要30秒，那么锯成6段需要多少秒．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">15 * 5</gadget>
<output>75</output>

<result>75</result>