There is a wooden stick 30 decimeters long, now draw a line on the wooden stick. First draw a line every 2 decimeters, then draw a line every 3 decimeters, and finally saw the stick according to the marked line. How many pieces can be sawed into?
有30分米长的木棍，现要在木棍上划线．先每隔2分米划一条线，再每隔3分米划一条线，最后按划线处锯开木棍，共能锯成多少段？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

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

<gadget id="calculator">10 - 5</gadget>
<output>5</output>

<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<result>20</result>