It takes 1.2 hours to saw a cylindrical piece of wood into 4 sections. If it is sawed into 10 sections, how many hours will it take?
一根圆柱形木头，锯成4段，需1.2小时，如果锯成10段，需多少小时？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">1.2 / 3</gadget>
<output>0.4</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">0.4 * 9</gadget>
<output>3.6</output>

<result>3.6</result>